Patents-Review.com
ClassID:

208690 ⎘

H01L31/1075 - CPC Classification

Classification description:

Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors characterised by at least one potential-jump barrier or surface barrier, e.g. phototransistors; Devices sensitive to infra-red, visible or ultra-violet radiation characterised by only one potential barrier or surface barrier the potential barrier working in avalanche mode, e.g. avalanche photodiode in which the active layers, e.g. absorption or multiplication layers, form an heterostructure, e.g. SAM structure

Recent Application in this class:
#1
20250072128
2025-02-27

GROUP III-V NANOWIRE-BASED AVALANCHE PHOTODIODE

 #2
20250072127
2025-02-27

High-sensitivity avalanche photodetectors

 #3
20250031466
2025-01-23

Optical sensing apparatus

 #4
20240429332
2024-12-26

Microstructure enhanced absorption photosensitive devices

 #5
20240395961
2024-11-28

PHOTODETECTION DEVICE, IMAGING DEVICE, AND DISTANCE MEASUREMENT APPARATUS

 #6
20240379723
2024-11-14

PHOTOELECTRIC CONVERSION APPARATUS, PHOTOELECTRIC CONVERSION SYSTEM, AND MOVING OBJECT

 #7
20240347665
2024-10-17

Avalanche photodiodes with lower excess noise and lower bandwidth variation

 #8
20240282880
2024-08-22

PLANAR INP-BASED SINGLE PHOTON AVALANCHE DIODE AND USE THEREOF

 #9
20240274742
2024-08-15

Avalanche Photodiode with Cascaded Multiplication Layers for High Speed and Wide Dynamic Range Applications

 #10
20240266459
2024-08-08

LOW NOISE GEIGER-MODE AVALANCHE PHOTODIODE AND MANUFACTURING PROCESS

 #11
20240243214
2024-07-18

PIE PHOTODETECTOR

 #12
20240234616
2024-07-11

AVALANCHE PHOTODIODE ARRAY

 #13
20240222545
2024-07-04

LIGHT SENSING ELEMENT AND MANUFACTURING METHOD THEREOF

 #14
20240213390
2024-06-27

PHOTODIODE DEVICES, PHOTODETECTORS, AND METHODS OF FORMING PHOTODIODE DEVICES

 #15
20240178337
2024-05-30

Optical Sensing Apparatus

 #16
20240170601
2024-05-23

MID-INFRARED AVALANCHE PHOTODIODES WITH LOW DARK CURRENTS

 #17
20240162366
2024-05-16

Inversion layer avalanche photodiode with vertical electric field

 #18
20240162365
2024-05-16

AVALANCHE PHOTODETECTORS WITH A COMBINED LATERAL AND VERTICAL ARRANGEMENT

 #19
20240128394
2024-04-18

PHOTODIODE SEMICONDUCTOR STACKS WITH REDUCED RECOVERY TIMES

 #20
20240120427
2024-04-11

SINGLE PHOTON DETECTION ELEMENT, ELECTRONIC DEVICE, AND LiDAR DEVICE

 #21
20240113246
2024-04-04

Methods of sperm cell sensing utilizing a semiconductor detector and cytometer apparatus

 #22
20240105876
2024-03-28

Light detection with semiconductor photodiodes

 #23
20240105875
2024-03-28

SILICON NITRIDE WAVEGUIDE COUPLED PHOTODIODE

 #24
20240063317
2024-02-22

Microstructure enhanced absorption photosensitive devices

 #25
20240047597
2024-02-08

PHOTODETECTION DEVICE AND MANUFACTURING METHOD THEREOF

 #26
20240038920
2024-02-01

PHOTODETECTOR WITH SEGMENTED ABSORBERS

 #27
20230369518
2023-11-16

OPTICAL SENSING APPARATUS

 #28
20230343886
2023-10-26

Photodiodes with serpentine shaped electrical junction

 #29
20230335665
2023-10-19

Avalanche photodetectors and image sensors including the same

 #30
20230335664
2023-10-19

Cascaded Avalanche Photodiode with High Responsivity and High Saturation Current

 #31
20230327041
2023-10-12

MESA AVALANCHE PHOTODIODE WITH SIDEWALL PASSIVATION

 #32
20230314209
2023-10-05

PHOTODIODE STRUCTURE WITH DARK CURRENT INDICATION FUNCTION AND PHOTOELECTRIC SENSOR

 #33
20230299225
2023-09-21

Geiger-Mode Avalanche Photodiode Arrays Fabricated on Silicon-on-Insulator Substrates

 #34
20230299223
2023-09-21

PHOTODIODE STRUCTURES

 #35
20230284467
2023-09-07

PEROVSKITE SOLAR BATTERY AND PHOTOVOLTAIC ASSEMBLY

 #36
20230275177
2023-08-31

PHOTO-DETECTING APPARATUS WITH LOW DARK CURRENT

 #37
20230261027
2023-08-17

Photoelectric conversion apparatus, photoelectric conversion system, and moving object

 #38
20230238405
2023-07-27

SEMICONDUCTOR DEVICE AND ELECTRONIC DEVICE

 #39
20230238403
2023-07-27

NORMAL-INCIDENT PHOTODIODE STRUCTURE WITH DARK CURRENT SELF-COMPENSATION FUNCTION

 #40
20230178678
2023-06-08

Methods of sperm cell sensing utilizing a semiconductor detector and cytometer apparatus

 #41
20230155050
2023-05-18

Avalanche photodetectors with a multiple-thickness charge sheet

 #42
20230121546
2023-04-20

Photodetector module comprising emitter and receiver

 #43
20230118125
2023-04-20

Optical semiconductor element

 #44
20230114395
2023-04-13

PHOTODETECTOR AND INTEGRATED CIRCUIT

 #45
20230054279
2023-02-23

Microstructure enhanced absorption photosensitive devices

 #46
20230030282
2023-02-02

Backside illuminated single photon avalanche diode

 #47
20220416110
2022-12-29

AVALANCHE PHOTODIODE STRUCTURE

 #48
20220416097
2022-12-29

WAVEGUIDE PHOTODETECTORS FOR SILICON PHOTONIC INTEGRATED CIRCUITS

 #49
20220415950
2022-12-29

LIDAR sensor using compound semiconductor materials for mobile device

 #50
20220406955
2022-12-22

Germanium-On-Silicon Avalanche Photodetector In Silicon Photonics Platform, Method Of Making The Same

 #51
20220406954
2022-12-22

Light detection with semiconductor photodiodes

 #52
20220399472
2022-12-15

Avalanche photodiode

 #53
20220399471
2022-12-15

Optical receiving element and manufacturing method therefor

 #54
20220384672
2022-12-01

HIGH SPEED AND HIGH TIMING RESOLUTION CYCLING EXCITATION PROCESS (CEP) SENSOR ARRAY FOR NIR LIDAR

 #55
20220384671
2022-12-01

High sensitivity single-photon avalanche diode array

 #56
20220367745
2022-11-17

Avalanche photodetectors and image sensors including the same

 #57
20220350090
2022-11-03

Photodetector with resonant waveguide structure

 #58
20220336691
2022-10-20

Avalanche photodiodes with lower excess noise and lower bandwidth variation

 #59
20220320361
2022-10-06

Photodetector

 #60
20220271186
2022-08-25

Avalanche photodiode and an optical receiver having the same

 #61
20220246785
2022-08-04

Methods of sperm cell sensing utilizing an avalanche photodiode and cytometer apparatus

 #62
20220246784
2022-08-04

Photodetection device and manufacturing method thereof

 #63
20220246775
2022-08-04

Microstructure enhanced absorption photosensitive devices

 #64
20220209040
2022-06-30

Photodiodes without excess noise

 #65
20220181378
2022-06-09

Photo-detecting apparatus with low dark current

 #66
20220165902
2022-05-26

Avalanche photodiode sensor and sensor device

 #67
20220165896
2022-05-26

Light receiving element, method of manufacturing light receiving element, and imaging apparatus

 #68
20220123163
2022-04-21

Avalanche photodiode and method for manufacturing same

 #69
20220109080
2022-04-07

Semiconductor light-receiving element and method of manufacturing semiconductor light-receiving element

 #70
20220102563
2022-03-31

Microstructure enhanced absorption photosensitive devices

 #71
20220093815
2022-03-24

Method of fabricating an avalanche photodiode employing single diffusion

 #72
20220085229
2022-03-17

Low noise Geiger-mode avalanche photodiode and manufacturing process

 #73
20220069153
2022-03-03

Germanium-on-silicon avalanche photodetector in silicon photonics platform, method of making the same

 #74
20220050184
2022-02-17

Single photon avalanche detector, method for use therefore and method for its manufacture

 #75
20220045230
2022-02-10

SHORT WAVELENGTH INFRARED OPTOELECTRONIC DEVICES HAVING GRADED OR STEPPED DILUTE NITRIDE ACTIVE REGIONS

 #76
20220014692
2022-01-13

Solid-state imaging apparatus and driving method thereof

 #77
20220013682
2022-01-13

Method for fabricating an avalanche photodiode device

 #78
20210408319
2021-12-30

AVALANCHE PHOTODETECTOR WITH DEEP-LEVEL-ASSISTED IMPACT IONIZATION

 #79
20210399156
2021-12-23

High sensitivity semiconductor device for detecting fluid chemical species and related manufacturing method

 #80
20210399155
2021-12-23

ASYMMETRIC LATERAL AVALANCHE PHOTODETECTOR

 #81
20210320217
2021-10-14

Avalanche photodiode

 #82
20210305442
2021-09-30

DILUTE NITRIDE OPTOELECTRONIC ABSORPTION DEVICES HAVING GRADED OR STEPPED INTERFACE REGIONS

 #83
20210288205
2021-09-16

Diode devices and methods of forming a diode device

 #84
20210280734
2021-09-09

Multi-junction pico-avalanche detector

 #85
20210249552
2021-08-12

Photodiodes without excess noise

 #86
20210249545
2021-08-12

OPTOELECTRONIC DEVICES HAVING A DILUTE NITRIDE LAYER

 #87
20210242362
2021-08-05

Infrared detecting device and infrared detecting system including the same

 #88
20210242354
2021-08-05

Microstructure enhanced absorption photosensitive devices

 #89
20210217918
2021-07-15

Linear mode avalanche photodiodes without excess noise

 #90
20210202778
2021-07-01

Separate absorption charge and multiplication avalanche photodiode structure and method of making such a structure

 #91
20210202764
2021-07-01

SEPARATE ABSORPTION CHARGE AND MULTIPLICATION AVALANCHE PHOTODIODE STRUCTURE AND METHOD OF MAKING SUCH A STRUCTURE

 #92
20210175384
2021-06-10

Avalanche photodiode structure

 #93
20210126149
2021-04-29

Integrated circuit comprising a single photon-based avalanche diode array and method for manufacturing such integrated circuit

 #94
20210111217
2021-04-15

Image sensors with silver-nanoparticle electrodes

 #95
20210098645
2021-04-01

Methods of sperm cell sensing utilizing an avalanche photodiode and cytometer apparatus

 #96
20210083138
2021-03-18

Optoelectronic component with current deflected to high-gain paths comprising a three-terminal avalanche photodiode having an insulating layer between absorbing region and a leakage path

 #97
20210066529
2021-03-04

Photo-detecting apparatus with low dark current

 #98
20210066528
2021-03-04

Avalanche photodiode and method of manufacturing the same

 #99
20210043792
2021-02-11

Photoelectric conversion apparatus, photoelectric conversion system, and moving object

 #100
20210036177
2021-02-04

Method for preparing avalanche photodiode

 #101
20210013357
2021-01-14

Photodiode

 #102
20200411710
2020-12-31

Single photon avalanche diode devices

 #103
20200411701
2020-12-31

Imaging device and imaging system

 #104
20200373453
2020-11-26

Photodetection element including photoelectric conversion structure and avalanche structure

 #105
20200322550
2020-10-08

Solid-state imaging apparatus and driving method thereof

 #106
20200313026
2020-10-01

Method of fabrication of a photonic chip comprising an SACM-APD photodiode optically coupled to an integrated waveguide

 #107
20200303582
2020-09-24

Doped absorption photodiode

 #108
20200295221
2020-09-17

Short wavelength infrared optoelectronic devices having graded or stepped dilute nitride active regions

 #109
20200292379
2020-09-17

Rear surface incident type light receiving device comprising an uppermost part of an electrode with a larger diameter than lowermost part of the electrode

 #110
20200259038
2020-08-13

Avalanche photodiode

 #111
20200220038
2020-07-09

Methods of sperm cell sensing utilizing an avalanche photodiode and cytometer apparatus

 #112
20200213538
2020-07-02

Solid-state imaging apparatus and driving method thereof

 #113
20200203548
2020-06-25

Optoelectronic component with current deflected to high-gain paths comprising an avalanche photodiode having an absorbing region on a p-doped lateral boundary, an n-doped lateral boundary and an amplifying region

 #114
20200185561
2020-06-11

Waveguide-integrated avalanche photodiode

 #115
20200168756
2020-05-28

Sam photodiode with multiplication of a single type of carrier in a periodic multilayer region

 #116
20200052145
2020-02-13

LATERAL GE/SI AVALANCHE PHOTODETECTOR

 #117
20200028000
2020-01-23

Microstructure enhanced absorption photosensitive devices

 #118
20200020821
2020-01-16

Low noise Geiger-mode avalanche photodiode and manufacturing process

 #119
20190384004
2019-12-19

Device for coupling a first waveguide with a second waveguide

 #120
20190371956
2019-12-05

Avalanche Photodetector with Single Mesa Shape

 #121
20190363213
2019-11-28

Systems, devices and methods for amplification of signals based on a cycling excitation process in disordered materials

 #122
20190363212
2019-11-28

Method for producing a photodiode and photodiode

 #123
20190319155
2019-10-17

High sensitivity semiconductor device for detecting fluid chemical species and related manufacturing method

 #124
20190267507
2019-08-29

Light-receiving element and near infrared light detector

 #125
20190267498
2019-08-29

Photo-detecting apparatus and photo-detecting method thereof

 #126
20190259901
2019-08-22

Avalanche photodiode and cytometer sperm sex sensing apparatus

 #127
20190259900
2019-08-22

Semiconductor light receiving element including si avalanche multiplication part and compound semiconductor light receiving layer

 #128
20190237610
2019-08-01

Directional photodetector and optical sensor arrangement

 #129
20190198701
2019-06-27

SPAD photodiode

 #130
20190189827
2019-06-20

Solid-state image sensor, image capturing apparatus, and image capturing method

 #131
20190165201
2019-05-30

Avalanche photodiode

 #132
20190165200
2019-05-30

Method and system for a focused field avalanche photodiode

 #133
20190157491
2019-05-23

Avalanche photodetectors and image sensors including the same

 #134
20190157472
2019-05-23

Optical waveguide integrated light receiving element and method of manufacturing the same

 #135
20190131480
2019-05-02

Nano avalanche photodiode architecture for photon detection

 #136
20190103504
2019-04-04

SPAD image sensor and associated fabricating method

 #137
20190097075
2019-03-28

Deep trench isolation (DTI) bounded single photon avalanche diode (SPAD) on a silicon on insulator (SOI) substrate

 #138
20190088813
2019-03-21

Cytometer sperm sex sensing apparatus with an avalanche photodiode

 #139
20190074397
2019-03-07

Avalanche photodiode

 #140
20190051784
2019-02-14

Lateral avalanche photodetector

 #141
20190019903
2019-01-17

SILICON WAVEGUIDE INTEGRATED WITH SILICON-GERMANIUM (Si-Ge) AVALANCHE PHOTODIODE DETECTOR

 #142
20190019899
2019-01-17

Microstructure enhanced absorption photosensitive devices

 #143
20180374980
2018-12-27

Method for manufacturing ultraviolet photodetector based on Ga2O3 material

 #144
20180374979
2018-12-27

Photodetection element including photoelectric conversion structure and avalanche structure

 #145
20180331246
2018-11-15

Avalanche photodiode

 #146
20180270405
2018-09-20

Imaging device and imaging system

 #147
20180259387
2018-09-13

Method for manufacturing rear surface incident type light receiving device including an electrode and characteristic inspection thereof

 #148
20180254373
2018-09-06

Process of forming light-receiving device

 #149
20180219120
2018-08-02

Doped absorption devices

 #150
20180198016
2018-07-12

APD focal plane arrays with backside vias

 #151
20180197905
2018-07-12

Solid-state imaging device

 #152
20180180805
2018-06-28

Fully integrated avalanche photodiode receiver

 #153
20180175231
2018-06-21

Semiconductor photodiode

 #154
20180138350
2018-05-17

Light-receiving element and optical integrated circuit

 #155
20180122848
2018-05-03

SYSTEMS AND METHODS FOR IMAGING USING SINGLE PHOTON AVALANCHE DIODES

 #156
20180102448
2018-04-12

Photodiode

 #157
20180053872
2018-02-22

Photoconductive semiconductor switch and method for manufacturing the same

 #158
20170345952
2017-11-30

Photodetector having one-dimensional grating structure

 #159
20170338367
2017-11-23

Lateral avalanche photodetector

 #160
20170338260
2017-11-23

Photodetector using bandgap-engineered 2D materials and method of manufacturing the same

 #161
20170309482
2017-10-26

Method for manufacturing a semiconductor device

 #162
20170271545
2017-09-21

Compensated photonic device structure and fabrication method thereof

 #163
20170271543
2017-09-21

Compensated photonic device structure and fabrication method thereof

 #164
20170263798
2017-09-14

Photodetector and LIDAR device using the same

 #165
20170256671
2017-09-07

Avalanche photodiode with low breakdown voltage

 #166
20170256666
2017-09-07

Back side illuminated image sensor with guard ring region reflecting structure

 #167
20170244002
2017-08-24

AllnAsSb avalanche photodiode and related method thereof

 #168
20170229599
2017-08-10

Photodiode, photodiode array, and solid-state imaging device

 #169
20170194527
2017-07-06

Nano avalanche photodiode architecture for photon detection

 #170
20170117430
2017-04-27

Photodetector using bandgap-engineered 2D materials and method of manufacturing the same

 #171
20170084773
2017-03-23

APD focal plane arrays with backside vias

 #172
20170069780
2017-03-09

Multicolor imaging device using avalanche photodiode

 #173
20170033254
2017-02-02

Semiconductor light-receiving device

 #174
20170033253
2017-02-02

Doped multiplier avalanche photodiode

 #175
20170012162
2017-01-12

Dual mode III-V superlattice avalanche photodiode

 #176
20160372624
2016-12-22

Optoelectronic detectors having a dilute nitride layer on a substrate with a lattice parameter nearly matching GaAs

 #177
20160372623
2016-12-22

Staircase avalanche photodiode with a staircase multiplication region composed of an AIInAsSb alloy

 #178
20160351743
2016-12-01

Avalanche photodiode and manufacturing method thereof

 #179
20160322417
2016-11-03

Optical detector with photodiode array having avalanche photodiodes connected to quenching resistors

 #180
20160300973
2016-10-13

VARIABLE RANGE PHOTODETECTOR WITH ENHANCED HIGH PHOTON ENERGY RESPONSE AND METHOD THEREOF

 #181
20160284919
2016-09-29

Enhanced deep ultraviolet photodetector and method thereof

 #182
20160254407
2016-09-01

Microstructure enhanced absorption photosensitive devices

 #183
20160218237
2016-07-28

Tunable hot-carrier photodetector

 #184
20160211402
2016-07-21

Photodetector

 #185
20160181460
2016-06-23

Avalance Photodiode

 #186
20160172525
2016-06-16

High-speed germanium on silicon avalanche photodiode

 #187
20160155883
2016-06-02

Ge/Si avalanche photodiode with integrated heater and fabrication method thereof

 #188
20160141430
2016-05-19

Avalanche photodiode receiver

 #189
20160126381
2016-05-05

Microstructure enhanced absorption photosensitive devices

 #190
20160099371
2016-04-07

Back side illuminated image sensor with guard ring region reflecting structure

 #191
20160093806
2016-03-31

Heterostructure comprising a carbon nanomembrane

 #192
20150340538
2015-11-26

Lateral Ge/Si avalanche photodetector

 #193
20150340537
2015-11-26

Avalanche photodiode semiconductor structure having a high signal-to-noise ratio and method for manufacturing such a photodiode

 #194
20150311375
2015-10-29

Variable range photodetector and method thereof

 #195
20150280045
2015-10-01

Radiation and temperature hard multi-pixel avalanche photodiodes

 #196
20150243800
2015-08-27

Ge/Si avalanche photodiode with integrated heater and fabrication thereof

 #197
20150236186
2015-08-20

Nano avalanche photodiode architecture for photon detection

 #198
20150214307
2015-07-30

METHOD FOR MANUFACTURING SEMICONDUCTOR DEVICE

 #199
20150179863
2015-06-25

AVALANCHE PHOTODIODE UTILIZING INTERFACIAL MISFIT ARRAY

 #200
20150179862
2015-06-25

Avalanche photodiode detector

 #201
20150129836
2015-05-14

CMOS pixels comprising epitaxial layers for light-sensing and light emission

 #202
20150115319
2015-04-30

PLANAR AVALANCHE PHOTODIODE

 #203
20150108327
2015-04-23

Devices including independently controllable absorption region and multiplication region electric fields

 #204
20150097256
2015-04-09

Semiconductor devices including avalanche photodetector diodes integrated on waveguides and methods for fabricating the same

 #205
20150076641
2015-03-19

Avalanche photodiodes with defect-assisted silicon absorption regions

 #206
20150028443
2015-01-29

Ge—Si avalanche photodiode with silicon carrier-energy-relaxation layer and edge electric field buffer region

 #207
20150008433
2015-01-08

Compensated photonic device structure and fabrication method thereof

 #208
20150001581
2015-01-01

SEMICONDUCTOR LIGHT RECEIVING ELEMENT AND LIGHT RECEIVER

 #209
20140367740
2014-12-18

GERMANIUM/SILICON AVALANCHE PHOTODETECTOR WITH SEPARATE ABSORPTION AND MULTIPLICATION REGIONS

 #210
20140291682
2014-10-02

High performance GeSi avalanche photodiode operating beyond Ge bandgap limits

 #211
20140252528
2014-09-11

Semiconductor photodetector and method for manufacturing the same

 #212
20140239301
2014-08-28

High performance surface illuminating GeSi photodiodes

 #213
20140217264
2014-08-07

Systems and methods for imaging using single photon avalanche diodes

 #214
20140183683
2014-07-03

Avalanche photodiode-type semiconductor structure and process for producing such a structure

 #215
20140175511
2014-06-26

AVALANCHE PHOTODIODE

 #216
20140151839
2014-06-05

Avalanche photodiode with low breakdown voltage

 #217
20140050492
2014-02-20

Reverse conductive nano array and manufacturing method of the same

 #218
20130292741
2013-11-07

High performance GeSi avalanche photodiode operating beyond Ge bandgap limits

 #219
20130221193
2013-08-29

Avalanche photodiode receiver

 #220
20130207217
2013-08-15

Method for forming a buried p-n junction and articles formed thereby

 #221
20130168793
2013-07-04

Avalanche photodiode

 #222
20130062663
2013-03-14

Dichromatic photodiodes

 #223
20130043372
2013-02-21

Multi-band position sensitive imaging arrays

 #224
20120326259
2012-12-27

Avalanche photodiode with special lateral doping concentration

 #225
20120299141
2012-11-29

AVALANCHE PHOTODIODE AND AVALANCHE PHOTODIODE ARRAY

 #226
20120199932
2012-08-09

LOW NOISE, STABLE AVALANCHE PHOTODIODE

 #227
20120193636
2012-08-02

Very high transmittance, back-illuminated, silicon-on-sapphire semiconductor wafer substrate for high quantum efficiency and high resolution, solid-state, imaging focal plane arrays

 #228
20120126286
2012-05-24

Monolithic three terminal photodetector

 #229
20110310467
2011-12-22

System having avalanche effect light sensor with enhanced sensitivity

 #230
20110291109
2011-12-01

Polarization enhanced avalanche photodetector and method thereof

 #231
20110284927
2011-11-24

Avalanche Photodiode

 #232
20110241150
2011-10-06

Avalanche photodiode

 #233
20110241070
2011-10-06

Avalanche photodiode and method for manufacturing the avalanche photodiode

 #234
20110180894
2011-07-28

Nanostructured photodiode

 #235
20110140168
2011-06-16

AVALANCHE PHOTOTECTOR WITH INTEGRATED MICRO LENS

 #236
20110095167
2011-04-28

System having light sensor with enhanced sensitivity including a multiplication layer for generating additional electrons

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