SensL IEEE presentation from Valencia Spain -- November 2011

1. IEEE NSS/MIC
SensL Exhibitor
Presentation
New products, technology and applications of Silicon
Photomultipliers
Carl Jackson – founder and CTO
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 1

2. SensL’s Breakthrough
SensL is the leading developer of Silicon Photomultiplier (SPM) technology
manufactured in standard CMOS foundries to replace the industry standard
Photomultiplier Tube (PMT)
SensL Enables:
Performance
Uniformity
Large Area
Form Factor
Low Cost SensL
Photomultiplier
Silicon Photomultiplier
Vacuum Tube
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 2

3. The SensL SL Silicon Photomultiplier (SPM)
2 nd Generation Low Light Detector
microcell
The SL SPM Array 8 inch SPM Wafer
x4774 microcells per 3mm SPM x2600 3mm SPM per wafer
 SensL’s SL SPM optimizes; signal to noise, fill factor, PDE, low power,
low voltage and uniformity while achieving critical OEM price targets
IEEE NSS-MIC 2011 Valencia 3
October 23-29, 2011

4. Introduction to SL
Silicon
SPM with improved Signal to Noise, market leading
uniformity and low cost for high volume applications
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 4

5. Goal of SL Silicon
Improve Signal to Noise
• Process
• Architecture
Optimise active area
• Efficient use of available space
Increase uniformity
• Enable high volume applications
Highest Performance / Cost Ratio
• Provide the clear detector choice for OEM applications
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 5

6. SL Typical Performance (30035 SPM Pixel)
High PDE : 10-25% High gain of 2.5E6 (2V>Vbr)
Low Dark Current : 3µA Low Temperature Dependence
(2V>Vbr) : 21mV/ºC
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 6

7. SL Operating Voltage Uniformity
• x800 ArraySL-4 in dataset
• x12,800 SL Pixels
• Operating voltage varied
by <±1% across dataset
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 7

8. SL Optical Uniformity Ratio (Max/Min)
• x800 ArraySL-4 in dataset
• x12,800 SL Pixels
• Single voltage applied to
each ArraySL-4
• Optical source correlated
to L(Y)SO pixel output
• Max and Min signal
recorded to calculate
optical uniformity
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 8

9. Comparison of SL Pixel Uniformity to the Multi-
Anode PMT
Maximum*
• SensL SL SPM products
provide industry leading
Typical* optical uniformity ratios
*Multi-Anode PMT typical and maximum values are from manufacture datasheet
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 9

10. SL Breakdown Voltage Uniformity
Wafer Level Data
 Data taken from a single wafer run of
un-binned SL Silicon Pixels
 >66k pixels in dataset
 Breakdown Voltage (Vbr) definition
Vbr = V(100nA)
 Performance of all Pixels:
 267mV Vbr variation
 <1% Pixel to Pixel Vbr variation
across all wafers
NOTE: A Full Body PET System is ~50k SL Pixels.
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 10

11. SL Optical Response Uniformity
Wafer Level Data
 Data taken from a single wafer
run of un-binned SL Silicon Pixels
 >66k SL Pixels in dataset
 Identical voltage applied to all
pixels and optical current
measured
 ±10% Optical Uniformity
between all pixels
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 11

12. SL Application
Performance
Select review of SL SPM operating in typical Hazard and
Threat and Medical Imaging applications
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 12

13. SL Application Performance
Hazard and Threat Detection
Detectors selected for review:
MicroSL-30035-X13 ArraySL-4-30035-CER
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 13

14. SL Ideally Matched for CsI(Tl) Emission Profile
*CsI(Tl) emission spectrum from Saint-Gobain datasheet
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 14

15. Hazard and Threat Detection
Radiation Detection (MicroSL-30035-X13)
3mm SL SPM can resolve to 14keV due to SL improved S/N ratio
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 15

16. Hazard and Threat Detection
Radiation Detection (ArraySL-4-30035-CER)
• Output summed
• (x16 channels into x1
pre-amplifier)
• 30V SPM bias
• 20ºC Temperature
• 13.5x13.5x13.5mm3
CsI(Tl) crystal
• 2µsec shaper
Cs-137 spectra: 662keV (9.7% FWHM) and • Ortec MCA
32keV lines
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 16

17. Hazard and Threat Detection
Radiation Detection (ArraySL-4-30035-CER)
• Output summed
• (x16 channels into x1
pre-amplifier)
• 30V SPM bias
• 20ºC Temperature
• 13.5x13.5x13.5mm3
CsI(Tl) crystal
• 2µsec shaper
Am-241 spectra: 59.5keV (26.45% FWHM) and • Ortec MCA
17keV lines
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 17

18. Hazard and Threat Detection
Radiation Detection (ArraySL-4-30035-CER)
Co-60 spectra: 1.17, 1.33 Mev and Extracted energy to ADC value shows
summation peak 2.5Mev are visible linearity to 2.5MeV
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 18

19. SL Application Performance
Medical Imaging
Detectors selected for review:
ArraySL-4-30035-CER ArraySL-4p9-30035
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 19

20. L(Y)SO Readout with SL SPM
SensL Laboratory Results
 Breakdown voltage = 27.5V
 Recommended operation
voltage = 29.5V (Vbr+2V)
 Typical reference measurement
 3x3x15mm3 LYSO Pixel
 Teflon wrapped
 BC-630 grease coupled
 Na22 source
 Typical results
 14% Energy Resolution at
511keV
 500ps Timing (electronics
dependant)
Individual pixel readout  Uniformity ±10%
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 20

21. High Density LYSO Crystal Block Readout
Chris Thompson
• Designed for 7T PET/MIR
• 1.67x1.67 LYSO crystals
• Dual crystal layers
• SensL products PET
• ArraySL-4-30035-CER ring
• ArraySL-4-PIXOUT
• ArraySL-4-EVB
* Images courtesy of Chris Thompson Poster M9-S46# 21
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 21

22. PET/MRI
Molecular Imaging Program at Stanford
1.5T RF OFF 1.5T RF ON
PET/MRI
• Readout through SPM modulated
VCSEL over fibre
• 2.14x2.14x20mm3 LYSO
• All components selected for magnetic
field compatibility
* Images courtesy of Peter Olcott and Craig Levin Poster (MIC 14-8)
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 22

23. PET - High Density Signal Multiplexing
West Virginia – Center for Advanced Imaging
SensL Array4p9
A 1.5mm LYSO Array flood map
DOI and MR compatibility 144:4 channel readout by AiT
Multiplexing from 144:4 channels
* Images courtesy of Stan Majewski (J2-3)
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 23

24. High Resolution PET System
MD Anderson
1
Collim
0.9 Flood
Backg
0.8
0.7
0.6
R Value
0.5
0.4
0.3
0.2
0.1
0
0 5
DOI function-Column 1 Row 5
1 1
Collimated Source Collim
0.9 Flood Calculation 0.9 Flood
Background Calculation Backg
0.8 0.8
0.7 0.7
0.6 0.6
R Value
R Value
0.5 0.5
0.4 0.4
0.3 0.3
Custom ASIC readout 0.2
0.1
0.2
0.1
2mm pitch, 30mm length LYSO array 0
0 5 10 15 20 25 30
0
0 5
Depth of Interaction
2ns timing
14% energy resolution
3-4 Depth of Interaction
* Images courtesy of Chad Birchner and Yiping Shao (MIC 7-3)
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 24

25. Conclusion
 SensL SL silicon is in mass production
 SL silicon provides
– High signal to noise
– Superior optical response uniformity of <1.2 (max/min)
– Superior Vbr uniformity of <1%
– Low voltage operation of 30V
– Low cost
 Proven performance in Hazard & Threat Detection and Nuclear
Medicine applications
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 25

26. Thank You
To discuss your application please visit our booth
28/29 during the show.
We are always available at www.sensl.com
October 23-29, 2011 IEEE NSS-MIC 2011 Valencia 26