Download SEMI S2 Section 26 Laser Safety

SEMI S2
Section 26 Laser Safety
SEMI S2
Section 26 Changes
Laser Data Sheet
John O’Donnell
Texas Instruments
Objective
• Communicate the rationale for and
changes to the laser safety section of
SEMI S2 0706
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Laser Safety Task Force
• The Laser Task Force scope was limited to:
– Relocating needed information from Related
Information 9 (Laser Data Sheet) to an Appendix (7)
– Making suitable changes to Section 26 and RI-9 to
reflect the relocation of the Laser Data Sheet
– Addressing any international or regulatory changes.
• This move would provide the equipment users
needed information about lasers in equipment
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Rationale for Change
• The original purpose of the S2 Laser Data Sheet was to
provide a standard format to communicate laser
equipment hazards and control measures information to
the user.
• Located in Related Information 9, the Laser Data Sheet
was not being used.
• The change to S2 was made to get appropriate laser
information to the people that need to use it to establish
control measures during the use, maintenance, and
service of semiconductor manufacturing equipment
• Equipment users needed access to laser hazard and
control data in order to implement effective laser safety
programs.
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Rationale for Change
• The User Perspective
– A standard format would communicate critical information
on laser hazards and controls needed for installation and
maintenance personnel to control laser hazards.
• Efficient Use of Resources
– Suppliers perform a laser hazard analysis once per model
– Every user would have to perform an analysis for each
tool that they have from every equipment manufacturer
• ESH has few enough resources and needs to
maximize the ability to provide a safe & healthy
workplace
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Who is affected?
• Equipment manufacturers
– Laser equipment requirements in SEMI S2,
Section 26.
• Third Parties
– Evaluate control measures and laser
hazards documented on Laser Data Sheet
• Device manufacturers
– Source of laser safety information to use in
workplace laser safety programs
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From Information To Requirement
• The original Laser Data Sheet was published in
Related Information 9 but remained there unused
by equipment manufacturers
• The laser line item required essential laser data to
be documented on the Laser Data Sheet.
• This change was approved in March 2004, but the
effective date was delayed until July 2006
• Effective July 1, 2006, the Laser Data Sheet is
Appendix 7, documentation for requirements of
Section 26
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Laser Data Sheet
APPENDIX 7
Laser Data Sheet – SEMI S2
A7-1 Equipment Information - (All Laser Product Classes)
Laser Equipment Manufacturer
____________________________________________________
Equipment Model #
________________________
Date Laser Data Sheet Completed ________________
Laser Product Classification
____________ (e.g., 1, 1M, 2, 2M, 3A, 3R, 3B, 4)
Classification Standard(s)
____________ (e.g., IEC, FDA/CDRH, JIS)
Certification File Identification Number
______________(e.g., CDRH accession number, or if CDRH accession number
has been applied for, but not yet received ‘pending’ may be used. If self declaring under IEC 60825-1 or if certification is not
required, e.g., if class 1 laser product is incorporated without changes, then ‘N/A’ may be used)
A7-2 Laser Information (Greater than Class 2 & embedded Class 3R (3A), 3B & 4)
Is access to laser radiation above the maximum permissible exposure (MPE) level
YES
NO
required during maintenance or service tasks?
____ _____
If NO, then the information in Parts A7-2, A7-3 and A7-4 need not be provided.
If YES, complete the information in Parts A7-2, A7-3 and A7-4 for each task and laser that requires access.
If there are multiple lasers contained within the laser equipment, provide the following for each task/laser combination that
meets the above criteria.
Laser Parameters
Laser ___1___, ___2___, __etc.__
Laser Manufacturer
_______, _______, _______
Laser Model No.
_______, _______, _______
A7-2.1 Laser Medium Type (HeNe, Nd:YAG, Argon, KrF, Diode, etc.)
_______, _______, _______
A7-2.2 Wavelength(s) in nanometers (nm)
_______, _______, _______
A7-2.3 Laser Hazard Classification (individual laser)
_______, _______, _______
NOTE 1: If a laser is used in both continuous wave and pulsed modes, complete both A7-2.4 and A7-2.5.
A7-2.4 Continuous Wave Lasers
A.
Power in Watts (W)
_______, _______, _______
B.
Irradiance in Watts/square centimeter (W/cm2 at aperture)
_______, _______, _______
A7-2.5 Pulsed Laser Characteristics
A.
Pulse Duration in Seconds (s)
_______, _______, _______
B.
Energy per Pulse in Joules (J)
_______, _______, _______
C.
Pulse Repetition Frequency in Hertz (Hz)
_______, _______, _______
D.
Average Power in Watts (W)
_______, _______, _______
E.
Radiant Exposure Joules/square centimeter (J/cm2)
_______, _______, _______
F.
Q-Switch controlled pulses
(Yes/No)
_______, _______, _______
A7-2.6 Beam Parameters at maintenance or service access points
Exception: In the case of proprietary information, an acceptable alternative to providing the Beam Parameters
is to provide NOHD results for each access point according to IEC 60825 or equivalent.
A.
Beam shape
Circular (C), Rectangular (R), Elliptical (E) _______, _______, _______
B.
Beam size (mm) Major axis (R/E) or diameter (C)
_______, _______, _______
Minor axis (R/E)
_______, _______, _______
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Laser Parameters
Laser
C.
Beam divergence in milliradians (mr)
Major axis (R/E) or diameter (C)
Minor axis (R/E)
D.
Focal length in millimeters (mm) (of the emitting lens)
Major axis (R/E) or diameter (C)
Minor axis (R/E)
E.
Is there a collecting optics hazard? (Yes/No)
___1___, ___2___, __etc.__
_______, _______, _______
_______, _______, _______
_______, _______, _______
_______, _______, _______
_______, _______, _______
A7-3 Laser Control Measures
A7-3.1 Specify maintenance/service tasks requiring access to laser radiation in excess of the MPE and recommended laser
control measures.
A.
Task 1 ________________________________________________________________
B.
Task 2 ________________________________________________________________
C.
Etc.
________________________________________________________________
Note 1:
Suppliers may alternately provide a reference to laser control measures information that is located in a document available to users.
A7-3.2 Of the tasks in A7-3.1, which tasks need a Laser Controlled Area? (e.g., for Class 3b or 4 lasers)
_______________________________________________________________________________
A7-3.3 If a nominal ocular hazard distance (NOHD) is used as a control measure, then provide the NOHD calculations and
assumptions. See IEC 60825-1 for NOHD calculations.
Exception: If specific information required by A7-2.6 is proprietary, suppliers may provide the NOHD results and an
explanation of the assumptions made.
A7-3.4 Include a beam path diagram identifying the accessible points.
NOTE 1: A description of the access points from the exterior of the tool can be considered equivalent to a diagram.
A7-4 Personnel Protective Equipment (PPE)
Provide information for accessible laser radiation hazards in excess of the Maximum Permissible Exposure (MPE)
Laser Parameters
Laser
A.
Optical Density (OD) of PPE required during maintenance
B.
OD of PPE required during service activities
C.
Other types of PPE (e.g., skin protection) if needed
Note 2:
___1___, ___2___, __etc.__
_______, _______, _______
_______, _______, _______
_______, _______, _______
Suppliers may alternately provide a reference to PPE information located in a document available to users.
Section 26 Changes
• 26.1 Requirement for laser product class and
applicable standard documented on Laser Data
Sheet
• 26.1.1 Alternate formatting option for Laser Data
Sheet
• 26.1.3 Laser and equipment labeling requirement
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Section 26 Changes (continued)
• 26.1.4 Maintenance and service task information
with access above MPE
• 26.1.4.1 Information on laser hazards, control
measures and PPE documented on Laser Data
Sheet. (Exceptions: Proprietary Information, Stand Alone system components)
• 2.1.5 Identification of laser source locations in user
documentation
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Summary
• Laser equipment classification and hazard
information is now a requirement
• Maintenance and Service task hazards and control
measures are required to be documented
• Laser Data Sheet provides format to document
required information
• This change was approved over 2 years ago
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