Download Bredthauer

Siliconus Maximus
SDW2005
Scientific Detector Workshop
June 19 – 25, 2005
Taormina, Italy
Richard A Bredthauer
Semiconductor Technology Associates, Inc.
27122 Paseo Espada, Suite 1004
San Juan Capistrano, CA 92675
949-4811595
[email protected]
and
Michael Lesser
UA Imaging Technology Laboratory
325 S. Euclid Ave., Suite 117
Tucson AZ 85721-0330
520-621-4236
[email protected]
Semiconductor Technology Associates
CCD Growth
• Relentless growth to larger
and larger devices with more
and more pixels.
• Applications to Digital still
photography and astronomy
CMOS IMAGER
Semiconductor Technology Associates
Guider Minimus
• STA1220A
• 2560x256 15 micron
dual output
• ~ 3 electrons noise
• Guider for Carnegie
and CFHT
Semiconductor Technology Associates
KEPLER
• Space based planet finder
– Prototype development
– E2V did production
• 4-phase, 3-edge buttable CCD
imager
• 2200 (Serial) X 1024 (Parallel)
27-micron square pixels,
• Split serial readout register at
the bottom.
Semiconductor Technology Associates
FAME
• Space based imager
• 3-phase, 3-edge buttable CCD
imager
• 2048 (Serial) X 4096 (Parallel)
15-micron square pixels,
• Split serial injection register at
the top
• Split serial readout register at
the bottom.
Semiconductor Technology Associates
Orthogonal Transfer Array
• Enables charge transfer in arbitrary
directions
• Capable of performing tip-tilt directly
within the CCD
• Collaborative program to PanSTARRS
with CFHT and Lincoln Labs
• Source of OTAs for WIYN ODI
program
Semiconductor Technology Associates
Orthogonal Transfer Array
• 3840x3952 Array of 8 x 8 cells
of 480x494 pixels
• 12 micron pixels
• Control lines for each cell
• Single readout for each column
of 8 cells
• Second iteration this summer
Semiconductor Technology Associates
STA0500A
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Custom lot run for UA astronomy
4kx4k 15 m pixels
Two device per wafer
Low noise amps
Several other custom devices on wafers
Two lots completed
Semiconductor Technology Associates
STA0500A Measured Backside
Performance
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2.8 electrons noise @ 50 kHz
HCTE and VCTE > 0.999998
Full well >80,000 electrons MPP mode
4 amplifiers
– 1,2, & 4 channel full frame readout
• Dark current  10 e/pix/hour @ -100C
Semiconductor Technology Associates
UA Foundry Wafer
•2 4kx4k CCDs
• 4 2688x512 CCDs
• 4 1200x800 CCDs
• 512x1024 FT guiders
• 128x128 AO devices
Semiconductor Technology Associates
STA0500A CTE
SN3556 HCTE
SN3557 VCTE
CTE > 0.999998
Semiconductor Technology Associates
Typical STA0500 Yield
• 44% unshorted from 24 wafers
• Grading:
– A/B – 15 (astronomy grade)
– C – 3 (engineering or special applications)
– D/F – 5 (typically unusable)
• Standard package is 3.0” Kovar tub
• Available both frontside and backside
Semiconductor Technology Associates
QE @ -115 C – Blue Optimized
SN3668
100%
90%
80%
Measured QE
70%
60%
50%
40%
30%
20%
10%
0%
300
400
University of Arizona
Roy A. Tucker
500
600
700
800
Wavelength (nm)
Semiconductor Technology Associates
900
1000
Temp = -115C
1100
QE @ -100 C – Broad Band
SN3671
100%
90%
80%
Measured QE
70%
60%
50%
40%
30%
20%
10%
0%
300
University of Arizona
Roy A. Tucker
400
500
600
700
800
Wavelength (nm)
Semiconductor Technology Associates
900
1000
Temp = -100C
1100
Magellan Imagery
• Received from ITL and imaging in
Chile in a record 2 weeks
• LDSS III Spectrograph
Semiconductor Technology Associates
Other Large Area Arrays
• 4kx8k Frame Store
• 8 micron pixels
• 16 outputs
• 2k x 2k
• 27 micron pixels
• 4 outputs
Semiconductor Technology Associates
Maximus
• Full 6” wafer imager
• 10k x 10k pixels
• Greater than 100,000,000 pixels
per frame
• Multiple low noise outputs
– 10 second full frame readout
• Backside thinned for max QE
• Brontosaurus of CCD imagers
Semiconductor Technology Associates
Hypothetical cost analysis
6.4 gigapixel science grade array
• 80,000 x 80,000 pixels
• 400 4kx4k 15 micron CCD imagers
– $50,000 each
– Total cost of $20,000,0000
• 64 10kx10k 9 micron CCD imagers
– $250,000 each
– Total cost of $16,000,0000
• 100 8kx8k 15 micron CCD imagers
– $220,000 each
– Total cost of $22,000,0000
Semiconductor Technology Associates
Space Based Universe
• Corollary to Ground Based universe
• Can stir the public imagination
• CASSINI Mission
– Last multibillion dollar NASA
space mission > $3 Billion US
• Spectacularly successful
accomplishment
Semiconductor Technology Associates
CCD Results
• Outstanding imagery of the
surface of Titan
• Equivalent 1 cm resolution from
1 billion km will require a 10,000
km telescope mirror
• 8x the diameter of Earth
Semiconductor Technology Associates
Space Science
• DISR CCD was also used
for the 1996 Mars Pathfinder
Mission
• Comprehensive data for years of
scientific analysis and a greater
understanding of our solar system
and universe.
Semiconductor Technology Associates
FINE
Semiconductor Technology Associates