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WE KNOW HOW
Product
and Service Offering
Our Complete
Your Partner for
Premium Contact Technology
¢ Contact Materials, Semi-finished Products
and Contact Parts
¢ Contact Rivets
¢ Stamping Technology
¢ Electro-mechanical Components
¢ Surface and Coating Technology
¢ Precious Metal recycling and Silver Powders
DODUCO is a global leader when it
comes to electrical contacts.
Since over 85 years we have been
active in precious metal processing.
Our broad experience and know-how
enables us to be a reliable partner to our
customers as a supplier of products and
services – in all stages of product development and planning, all the way to
manufacturing and recycling.
DODUCO serves the electrical, electronics, automotive and many other industries through its business units for precious metal contact materials, stamping
technology, contact parts, for high and
medium voltage, electromechanical
components, surface coatings and
precious metal recycling.
By combining these different technologies we can create optimal technical
and economical solutions. Our in-house
application and testing laboratories with
state-of-the-art equipment allows us to
conduct fundamental research, optimize
products and processes and find innovative solutions. With production
RANGE OF PRODUCTS AND SERVICES
facilities in Germany (Pforzheim,
Sinsheim), Spain (Madrid) and in China
(Tianjin) we are close to development
and manufacturing centers of leading
customer companies. Our global sales
organization is ready to serve as a
contact partner in most countries
around the world.
Market driven dynamics and
customer oriented services the
business principles we live by.
The basis of this philosophy was established by the company founder Dr.
Eugen Dürrwächter. In 1922 he started
DODUCO as a precious metal refining
company for gold, silver and platinum
materials for the reclamation and re-use
in jewelry making in Pforzheim, the
jewelry center of Germany. The development of improved processing allowed
the jewelry industry to introduce many
new products to their market.
Soon after Dr. Dürrwächter realized that
the growing electrical industry provided
a new market opportunity for related
materials. DODUCO engaged very early
in the manufacturing of precious metal
electrical contacts and their alloys and in
1932 established a dedicated factory for
contact manufacturing. By investing in
new technologies and based on the
innovation driven spirit of its employees
DODUCO developed over the years into
a technology company and a world
leader in electrical contact manufacturing. Today DODUCO is an internationally operating company with approximately 1.300 employees worldwide.
Optimizing existing and developing new,
innovative and environmentally friendly
products, processes and technologies
ensures the long term growth objectives
of the company – always with advantages to our customers in mind and
supported by the exceptional knowledge and motivation of our employees.
To our customers the name DODUCO is
a trademark for quality and at the same
time synonymous for technological
leadership and customer service in all
areas of contact manufacturing and
sales – with a unique depth of
processing and product technologies.
Results-oriented
Development Cooperation
employed in the manufacturing of simple
contact parts up to seamless solutions
to customer project requirements.
New products offer new opportunities for our customers.
To quickly respond to the many market
challenges you should from the start
take advantage of the technological
competence of DODUCO.
Our application and process engineers
and development staff are available in
the early design stage with concept
developments for meeting the requirements of the new product regarding
resource utilization and cost-benefit
profiles. Many years of experience are
employed to evaluate design principles,
the electrical and mechanical requirements and to select the most suitable
contact materials. We also consider the
influences of applied manufacturing
technologies and the environmental
effects on the design and materials.
As a true cooperation partner we actively
incorporate our knowledge and experience into the improvement and new
development of customer products.
We can apply our unique and comprehensive depth of manufacturing: from
contact materials manufacturing by
powder and melt metallurgy all the way
to electromechanical components, from
precision stamping through contact parts
and surface coatings to the complete
range of precious metal recycling. Every
single step of production can be
DODUCO employees can assume the
role of project managers or can pragmatically cooperate with the customer's
experts.
Our project management serves as the
link between the customer and manufacturing, product development, suppliers,
the laboratory services involved and
quality assurance. It coordinates technical alternatives and transparently
monitors and controls time tables, costs
and additional measures as required.
Focal points are always the customer's
product, optimal quality and the shortest
possible time-to-market.
At DODUCO development cooperation
always means responsible, open and
target oriented cooperation with our
partners.
Early on technical, economical and
logistics aspects are considered.
Product Development
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RANGE OF PRODUCTS AND SERVICES
DODUCO is your expert in electrical
contacts
For over 70 years our world has centered on precious metals and the conduction of electrical energy. We conduct
basic research, development in the
areas of new materials manufacturing
and processing technologies involved in
the production of electrical contacts. We
disseminate our expertise through
publications, presentations at technical
seminars and conferences and through
application engineering. We also participate in cooperative development
partnerships with various institutions.
DODUCO develops new electrical
contacts
The requirements on electrical contacts
are very versatile. Current, voltage, load
characteristics, geometry, kinetics and
kinematics are different for every application. They pose a new challenge with
every new project. DODUCO has a very
broad spectrum of contact materials and
processing technologies. These are
constantly improved upon in an application based and project oriented way.
DODUCO offers comprehensive
technical application engineering
The most suitable selection of contact
materials requires expert knowledge. Our
application engineers are specialists in
their respective fields. They contribute to
the project and give successful advice
during all project phases. They are
supported in their efforts by our modern
equipped application and test
laboratories.
DODUCO has the full depth of
manufacturing technologies
We exemplify a unique and comprehensive depth of manufacturing: from
precious metal refining through semifinished materials manufacturing by
powder and melt metallurgy all the way
to precious metal contacts. Stamping
technology, plastic molding, electroplating and the whole range of welding
and rivet staking techniques – our knowhow is at your disposal. Every level of
manufacturing depth, from a simple
contact part up to seamless solutions for
complex components is available.
Contact Materials, Semi-Finished Products, Contact Parts for
Power Engineering and Information Technology
Competency in Electrical Contacts
The properties of the contact material
are the deciding factors for the reliable
function of the contact spots in any
electromechanical device. From a broad
range of contact materials we develop
and manufacture semi-finished products
and contact parts, which are optimized
towards the application in electromechanical switching devices and electronic
components. Using the most environmentally friendly composite materials and
alloys, such as for example Silver-Tin
Oxide, is of increasing importance.
Contact Materials for Information
Technology
Silver and Silver Alloys (Ag, AgCu):
Favorable electrical properties for a
broad application range.
Silver-Palladium (AgPd):
Sulfur resistant contacts.
Fine Silver (Ag):
Combines the best electrical and
thermal conductivity with very good
chemical stability.
Gold-Cobalt (AuCo) and PalladiumCopper (PdCu):
With special microstructure, resistant
against material transfer in DC circuits.
ARGODUR Spezial (Fine Grain Silver
AgNi 0.15):
Better arc erosion resistance than Fine
Silver.
Gold-Nickel (AuNi) and Gold-SilverNickel (AuAgNi):
Significantly improved mechanical
strength compared to Gold. For high
reliability contacts for switching low
loads.
ARGODUR 27 (AgCuNi) and Hard Silver
(AgCu):
Strongly increased mechanical properties with decreased chemical stability,
compared to ARGODUR Spezial.
Contact parts for low voltage power engineering
ARGODUR 32 (AgMgNi):
In precipitation hardened condition
suitable as temperature stable spring
and contact material for higher power
relays.
Gold-, Platinum- and Palladium-Alloys:
For highest requirements on corrosion
resistance.
Semi-finished Materials
Wire, strip and profiles from precious
metals, their alloys and composite
materials.
Wire
Solid, also electroplated with Silver or
Gold
Strip
Electroplated with Silver or Gold. Totally
clad on one or both sides (Overlay). Clad
as stripe on strip or at edge with
precious metal or Aluminum (Inlay,
Edgelay) – also known as ContactBimetals.
Selectively electroplated with Silver,
Gold, Palladium, Tin
Tinned by hot-dipping in stripe form or at
edges
Profiles
Solid, two- or multiple layers as miniature
profile.
Brazed onto substrate strip material as
Toplay profile. Seamwelded onto thin
spring-hard carrier strips as FDR profile.
Silver Bronze
With high electrical conductivity
CONDUFLEX High Conductivity Spring
Materials
Multi-layer composite materials with
good spring properties and high electrical conductivity
DODURIT ZnO, Silver-Zinc Oxide
(Ag/ZnO):
For current limiting powder switches,
motor protectors and for electrical wiring
applications.
DODURIT CdO, Silver-Cadmium Oxide
(Ag/CdO):
Internally oxidized or made by powder
metallurgy. High load contacts in low
voltage switching devices.
GRAPHOR, Silver-Graphite (Ag/C):
For switching contacts with extremely
high resistance to contact welding in
circuit breakers and for sliding contacts.
SIWODUR, Silver-Tungsten and SilverTungsten Carbide (Ag/W and Ag/WC):
For circuit breakers and protective power
switches.
SILMODUR, Silver-Molybdenum
(Ag/Mo):
As highly arc erosion resistant contacts
in circuit breakers.
RANGE OF PRODUCTS AND SERVICES
Composite Bi- or Tri-metal Rivets
With contact layers of Silver, Silver alloys,
Silver-Metal Oxide or Silver-Nickel on a
copper base.
Contact Tips
With bottom layer suitable for brazing or
welding, also with brazing alloy coated
underside.
Weld Buttons
With contact material surface layer and
weldable material on bottom.
Rivet-staked, Brazed, Welded or Clad
Contact Parts
FULMIDUR
Welded contact assemblies.
Contact Pins and Arc Tip Assemblies
With Tungsten-Copper tips.
CUWODUR, Tungsten-Copper (W/Cu):
Extremely arc erosion resistant for load
switches and circuit breakers in medium
and high voltage switchgear.
VAKURIT, Low gas content materials
based on Copper-Chromium and
Tungsten-Cooper (Cu/Cr and W/Cu):
For vacuum switches and circuit
breakers.
Contact Materials for Power
Engineering
SINIDUR, Silver-Nickel (Ag/Ni):
For auxiliary current switches, relays and
circuit breakers (with Silver-Graphite as
mating contact)
SISTADOX, Silver-Tin Oxide (Ag/SnO2):
Manufactured by powder metallurgy
(AgSnO2 with and without additives) or
internally oxidized (with In2O3).
Environmentally friendly and arc erosion
resistant contacts for relays, contactors
and circuit breakers.
Contact Parts for Power Engineering
Contact Rivets
Solid from Silver, Silver alloys and
composite materials.
Refractory contacts for high voltage
power enginieering
Contact Tulips and Tubes
With Tungsten-Copper layers on Copper
or Copper-Chromium-Zirconium carriers.
Spring-loaded Contact Tulips
From Copper-Chromium-Zirconium for
current carrying main contacts.
SISTADOX 12 WPD
CUWODUR
with braze alloy backing microstructure
Contact Discs, Rings and Formed Parts
From low gas content materials based
on Tungsten-Copper or CopperChromium for vacuum switches.
Production Competency
in Stamping Technology
The Full
DODUCO manufactures precision
stamped parts incorporating electrical
contact functions. These can be welded,
brazed, riveted, coated by electroplating, clad or mechanically mounted
and assembled. Depending on our
customer's requirements we supply
these products as individual parts, prestamped strips, in comb segments or
blister packaged.
Welded Stamped Parts
The contacts are attached by resistance
welding from wire, profiles or by feeding
of single contacts. Depending on the
application, Gold, Silver or Palladium
based contact materials are used.
Riveted Stamped Parts
Utilizing composite Bi- or Tri-metal rivets
manufactured at our facility in Spain
Equipment for blister packaging of small contact parts
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Progressive die with assembling of springs
allows to keep the usage of precious
metal at the absolute minimum required
for reliable switching functions.
During wire-staking – the forming of rivet
shaped contacts in a progressive die –
the contact rivet is produced without
additional costs and allows significantly
higher production speeds.
Stamped Parts from Semi-finished
Contact Materials
Stamped contact parts made from semifinished strip material are economically
manufactured endlessly and at high
production rates.
The contact materials made in our mill
operations are based on Gold, Palladium
and Silver. Aluminum is used as a
bondable surface layer.
Sub-assembled Stamped Parts
In a progressive die the attachment of
stamping frames to each other is
performed by forming and riveting or by
welding. This way the different properties
of the individual components can be
combined in the assembled stamped
part. Such as, for example, high electrical conductivity with exceptional spring
properties.
Added Value for Our Customers
By linking the above technologies and
adding multiple form tapping devices into
a progressive die, we can offer to our
customers the most economical
solutions on the highest level.
Electro-mechanical
Components
Comprehensive tool building for all important production steps
Synergy of Material and Function
In Europe DODUCO develops and
manufactures electromechanical components of varying complexity; if requested, even electronic components can be
incorporated, greatly expanding their
functionality range. Combining plastics,
metal parts and contact surface coatings leads to a complete solution which
reduces for our customers the need for
additional interfaces and produces significant cost savings. In order to accomplish these goals we get involved in the
early stages of development and design.
Assembly Technology
Stamped, plastic molded and
discrete electronic components are
assembled to components with new
extended functionality.
Hybrid Housings
Metal – Plastic composite
components with single or multiple
stamped and/or electronic insert
parts for the application in electronic
circuits.
Hybrid frames for application in power electronics and automotive contact systems
and management of control functions
Over-molded components
RANGE OF PRODUCTS AND SERVICES
Reel-to-Reel Technology
Contact systems combined in metalplastic composites as a solution to
customer-specific application
requirements.
Assembled components for hybrid applications
and automotive mirror memory setting
Products, Processes and Coatings
for the
Surface Technology
The Unique Service Combination
The combination of related products and
services allows elaborate solutions from
one source. DODUCO supplies precious
and non precious metal electrolytes for
technical and decorative applications
and offers job-shop surface coating
using all important processes.
Electroplating Solutions for Technical and Decorative Applications
Gold Electrolytes
Acidic, neutral and cyanide gold electrolytes for the deposition of Pure Gold,
Hard Gold, Colored Gold and Gold Alloy
layers. Electroless Gold baths and galvano-forming solutions. High speed
processes for reel-to-reel plating.
Platinum Metal Electrolytes
Electrolytes for the deposition of
Ruthenium, Rhodium, Palladium,
Palladium-Nickel and Platinum.
DODUSTAN
Immersen Tin process for the electroless
tinning of printed circuit board and other
technical applications.
Silver Electrolytes
Electrolytes for the deposition of Hard
and Pure Silver.
DODUBOND
Electr.-Ni/Pd/Au ENIPIG and ENEPIG,
Pd/Au EPIG process for surfaces for
gold wire bonding.
Non-precious Metal Electrolytes
Copper and Nickel electrolytes for
technical and decorative applications.
Tin and Tin-Lead baths for electrical and
electronic surface coatings.
White and Yellow Bronze processes for
technical and decorative applications.
CONTAMET
Electroless Nickel baths for different
technical applications.
DOFLUX
Flux for hot air leveling with lead-free and
lead containing Tin.
Products for the Metal Surface
Treatment
Cleaning and polishing agents, Etching
solutions, Metal strippers, Anti
Tarnishings.
Precious Metal Salts and
Concentrates
Gold salts and Gold complexes, Silver
salts, Concentrates for Platinum,
Rhodium, Ruthenium- and Palladium
electrolytes.
Precious Metal Preparations
ARGONOR Silver for furnace firing
For the manufacture of conducting
coatings and circuit paths on glass,
quartz and ceramics.
AUROMAL Silver Conductive Paints,
Pastes And Conductive Adhesives
For the coating, contacting and bonding
of plastics, metals, ceramics and glass.
Electrically Conductive Single- and TwoComponent Adhesives
GRAPHAROL Conductive Adhesives
For electrostatic and high-resistance
applications.
Services
Technical Consulting, assistance in
Coating technology for decorative
and technical applications
RANGE OF PRODUCTS AND SERVICES
manufacturing, analytical analysis testing
customer specific application and
process development.
Braze Alloy Powders
For brazing of automatically produced
jewelry chains.
Job-shop Parts Electroplating
Plating with Gold, hard Gold, Silver, hard
Silver, Rhodium, Palladium, PalladiumNickel and Platinum for electrical
engineering and electronics, automotive
components, aerospace industry, HF
technology, chemical industry,
mechanics, laser optics, measurement
and control and medical technology.
Selective and spot plating of Gold and
Silver on combs and single parts.
Internal plating of hollow parts.
Custom electroplating with controlled
thicknesses:
Silver up to 300 µm, hard Gold up to
30 µm, Fine Gold up to 100 µm.
Non-precious Metal Surface Coatings
With Copper, Nickel, Tin, Tin-Lead,
Bronze-DODUBRONCE.
Chemical Electroless Nickel
Rack- and barrel-plating.
Electrolytes and processes for technical surfaces
Printed Circuit Board Plating
Plating of rigid, rigid-flexible and flexible
PCBs up to 610 x 605 mm with Nickel,
Tin, Tin-Lead, Silver, Fine Gold, Hard
Gold and Electroless Nickel/Gold –
DODUCHEM and DODUBOND.
Rhodium and Palladium coatings up to
500 x 400 mm and 300 x 400 mm resp.
Ceramic Substrates
Coating of conductive circuit paths on
ceramic substrates with solderable and
bondable (Al, Au wires) surfaces.
Printed Circuit Board Express Service
At our customer's request we can
provide a turn-around time of 24 hours.
Aluminum coatings
Coating of Al, Al alloys and Al composite
materials with electroless Ni and
electroplated solderable layer.
Silver Powder
Chemical precipitation
fine, agglomerated / wide range of
specific surface areas
Electrolytic deposition
dendritic / crystalline, densely
agglomerated, medium to low specific
surface areas
Atomization
spherical / high tap density, low specific
surface areas
Flakes
Materials and Coatings
for Electronics
Reel-to-Reel Strip Electroplating
Coating of strip, wire or stamped parts
reel-to-reel
With Gold, Silver, Palladium-Nickel,
Copper, Nickel, Tin and Tin-Lead.
In addition strips can also be tin coated
by hot-tin-dipping.
Full or selective coverage in stripes
On one or both sides of the strip
material.
PVD (Physical Vapor Deposition)
Coatings
With precious metals, precious metal
alloys, non-precious metals and alloys.
Specialty coatings such as Titanium/
Titanium Nitride, Chromium, Molybdenum, Tungsten and Aluminum.
Process Combinations
Combined coatings of electroplated and
PVD layers for high performance
applications.
We Offer More for Power
Electronics
Based on our broad spectrum of
materials and material combinations we
offer comprehensive solutions for the
electronic packaging and connection
industry. They include selected materials
structures and the deposition of defined
coating.
Aluminum-clad Strip And Stamped Parts
for Housings in Controls And Power
Electronics
AlSi1-clad copper and copper alloy
strips with and without electroplated
surfaces, and stamped parts.
The connection between the connector
and the electronic circuit is achieved by
Aluminum wire bonding on AlSi1.
Coating of AlSiC heat sinks
Engineering Services
Technical consulting, development of
customer specific coating properties,
specialty coatings to agreed customer
specifications.
Vacuum PVD coated parts
RANGE OF PRODUCTS AND SERVICES
Molybdenum substrate discs
Coating of Substrate Materials for Power
Electronics
Molybdenum substrate discs electroplated with precious and non-precious
metals within close mechanical tolerances. Coatings are applied on both sides
or selectively as required by the appli-
cation. Electroplated and chemical deposition of Nickel on composite Aluminum/Silicon Carbide (AlSiC) material for
soldering applications. AlSiC is increasingly used as heat sink material in
power electronics.
Aluminum clad strip and stamped parts
Metal Recycling
Precious
for the World of Tomorrow
New Materials from Scrap
Our precious metal refining facility uses
efficient and environmentally safe processes to reclaim the precious metals
Gold, Silver, Platinum, Palladium and
Rhodium from different manufacturing
residues.
Precious metals are recovered from the
following materials:
Contact Materials
n Clad strip and stamping scrap
n Alloying scrap
n Silver-Tungsten scrap
n Brazed and assembled contact parts
Precious metal melting
RANGE OF PRODUCTS AND SERVICES
Recycling equipment
X-Ray-Analytical equipment
Electronics
n Processors and integrated circuits
n Ceramic substrates
n Paste coated foil scrap
n Connectors and switches
n Printed circuit boards
Electroplating
n Surface coated metal scrap
n Precious metal containing spent
electrolytes and rinse water
n Saturated resins and filters,
electrolytically deposited precious
metal powders and sludge
Catalysts
n Automotive exhaust catalysts
n Catalysts from the chemical industry
n Silver catalysts
Others
n Jewelry alloys, jewelry making and
dental alloy scrap
Quality Management
Benefitting Our Customers
Comprehensive
DODUCO is the Right Partner for
You
For the development of a new product it
is important to select the right partner
who has the experience and resources
to help in accomplishing your project
objectives. DODUCO employs all key
technologies, including contact material
manufacturing, precision stamping, electromechanical component assembly,
RANGE OF PRODUCTS AND SERVICES
surface coating and precious metal
recycling. The necessary stamping and
plastic molding dies are also produced
in-house. This allows us to offer complete seamless solutions from a single
source. For each of the manufacturing
phases critical quality requirements can
be established. This leads to the high
quality standard of DODUCO.
Highest Quality Standard
DODUCO's quality management system
is certified globally according to the DIN
ISO 9001 standard. Depending on
specific market requirements we are also
certified for ISO TS 16949.
Our Competencies
Technical Consulting
Comprehensive application engineering
assistance
Testing of Switching Devices
We conduct electrical power
performance and life testing according to
DIN VDE 57660/Part 101-104, DIN VDE
57664,DIN VDE 57641.
Power limits: 690V/6kA
n Bounce characteristics
n Electrical life of contact parts
n Temperature rise
n Make and break capacity
n Arc movement behavior
n Chopping current characteristics
for vacuum switch contacts
Material Testing and Surface
Analysis
Contact resistance measurement
Metallography:
Microstructure analysis
Failure analysis
Chemical Analysis:
X-ray fluorescence (RFA)
Atomic absorption spectroscopy (AAS)
Gas content analysis
Surface Analysis:
Scanning electron microscopy (SEM)
Energy and wavelength dispersive X-ray
analysis (EDX, WDX)
Research and Development Activities
Concentrating on materials, surface
technology, analytical methods, powder
metallurgy, wear reducing surface layers
(PVD), decorative and functional surface
treatments (Electroplating, PVD)
WE KNOW HOW
DODUCO GmbH
Im Altgefäll 12
75181 Pforzheim
Germany
Phone +49 7231 602-0
Fax
+49 7231 602-398
~
DODUCO ESPANA, S.L.
Manises 1
28224 Pozuelo de Alarcón
Spain
Phone +34 91 799-4620
Fax
+34 91 799-4655
DODUCO (Tianjin) Co., Ltd.
Yejin Road 32, Nankai District
Tianjin, PC 300111
P.R. China
Phone +86 22 2764-1538
Fax
+86 22 2764-1609
http://www.doduco.net
Mail: [email protected]
Printed in Germany by WA,SCHN . 05.2011 .1,0 e
DODUCO GmbH
Breite Seite 1
74889 Sinsheim
Germany
Phone +49 7261 409-0
Fax
+49 7261 409-238