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This is the Top Page of the AIPS HOMEPAGE
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E-Tegami of Tomie Hagiwara
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WAKA ( Japanese Short Poem )

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Society of Semiconductor Industry Specialists (SSIS)
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SSIS_Education_Semiconductor_Technical_Seminar_Program


SSIS_Education_GP_Activity_PR_MP4_01
SSIS_Education_GP_Activity_PR_MP4_02
SSIS_Education_GP_Activity_PR_MP4_03
Image_Sensor_Introduction_MP4_Video_for_AIPS_Robotics_by_Yoshiaki_Hagiwara

Image_Sensor_Story_Hagiwara_html ( Members Only )
SSIS_Education_Activity ( Members Only )


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Essay "Candy in the Heart" by Yoshiaki Hagiara
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Artificial Intelligent Image Sensor_by_Yoshiaki_Hagiwara.pdf
Artificial_Intelligent_Image_Sensor_by_Yoshiaki_Hagiwara.html
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Image_Sensor_Story_by_Yoshiaki_Hagiwara.html

Image_Sensor_Story_by_Yoshiaki_Hagiwara.pdf

Hagiwara_invented_PPD_and_Sony_HAD_in_1975.html

Hagiwara_invented_PPD_and_Sony_HAD_in_1975.pdf

The_First_Pinned_Photodiode_was_invented_in_1975_by_Yoshiaki_Hagiwar_at_Sony.pdf




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AIPS is the non-profit private organizaion (NPPO)

dedicated to produce scientific guide books and educational and introductory materials

devoted for the develpments of the Human Friendly Artificial Intelligent Partner System (AIPS),

AI Real Time Pattern Recognition Processors and Robotics Intelligent Vision Systems.


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Hagiwara Yoshiaki Lecture Notes for AIPS Robotics

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Yoshiaki Hagiwara was invited to talk about his dreams

in the international technical conferences .



https://imagesensors.org/

P1979_CCD79_in_Edinburgh_1979.pdf

https://www.esscirc-essderc2021.org/

http://www.aiplab.com/P2001_ESSCIRC2001.pdf 

http://www.aiplab.com/P2008_ESSCIRC2008Hagiwara.pdf 

http://isscc.org/

P2013_ISSCC2013PanelTalk.pdf

https://www.coolchips.org/


P2017_CoolChipsPanel170419.pdf


Yoshiaki Hagiwara also wrote papers about his works and dreams.


P1978_Pinned_Photodiode_1978_Paper_by_Hagiwara.pdf

P1996_Pinned_Photodidoe_used_in_Sony_1980_FT_CCD_Image_Sensor.pdf 

P2019_3DIC2019Paper_on_3D_Pinned_Photodiode.pdf 

P2020_EDTM2020_PaperID_3C4_by_Hagiwara.pdf
 

P2020_EDTM_PaperID_3C4_by_Hagiwara_MP4_Video_Presentation



These works were based on the following Japanese Patent Applications

that was never been desiclosed in details until recently

because of Hagiwara himself neglecting to appeal its importance.


JP1975-127646.pdf 

JP1975-127647.pdf 

JP1975-134985.pdf 

JP1977-126885.pdf 



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On Nov 13, 2021, a Japanese Newspaper by Sangyou Times
wrote an aticle introducing Hagiwara.
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https://www.sangyo-times.jp/article.aspx?ID=5331


Future_of_Image_Sensors_and_Solar_Cells.pdf

Future_of_Image_Sensors_and_Solar_Cells.html


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Sony_acknowledged_that_Hagiwara_invented_PPD_with_VOD_for_Electric_Shutter_Function

Semiconductor_History_Museum_of_Japan_also_supoorts_Hagiwara_1975_PPD_invention

Hagiwara_drew_the_Triple_Junction_Type_Pinned_Photodiode_in_his_1975_Lab_Note



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AIPS Library
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Yoshiaki Hagiwara wrote a book on
"the World of Artificial Intelligent Digital Circuits",
which is important and needed to built
the intelligent image sensor systems.

ISBM978-4-88359-339-2
Hard Cover, 460 page,
\ 9000 Japanese Yen + tax




If you are interestied in the book, Please visit

https://www.seizansha.co.jp/ISBN/ISBN978-4-88359-339-2.html

https://www.seizansha.co.jp/

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Basic Questions on Image Sensors
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Gate Way to AIPS Library

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index_001_Enjoy_the_World_of_Hagiwara_Tomie_E_Tegami_Gallery.html

index_002_Enjoy_the_World_of_Hagiwara_Yoshiaki_Talks_and_Photo_Desk.html

index_003_Enjoy_the_World_of_Japanese_Short_Poem.html

index_004_Enjoy_the_World_of_Korean_Conversation.html

index_005_Enjoy_the_World_of_English_Conversation.html

index_006_Enjoy_the_World_of_Mathematics_Physics_and_Relativiry_Theory.html

index_007_Enjoy_the_World_of_Quantum_Mechanics_and_Semiconductor_Device_Physics.html

index_008_Enjoy_the_World_of_Artificial_Intelligent_Partner_System_AIPS_Digital_Circuits.html

index_009_Enjoy_the_World_of_Solid_State_Image_Sensors_and_PPD_Solar_Cells.html

index_010_Hagiwara_is_the_true_inventor_of_Pinned_Photodiode_PPD_and_Sony_HAD.html


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Hagiwara_invented_PPD_and_Sony_HAD_in_1975.pdf


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001_Hagiwara_invented_PPD_and_Sony_HAD_in_1975.pdf

002_Image_Sensor_Story_by_Hagiwara.pdf

003_Future_of_Image_Sensors_and_Solar_Cells.pdf

004_The_First_Pinned_Photodiode_was_invented_in_1975_by_Yoshiaki_Hagiwar_at_Sony.pdf

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What is the difference of Pinned Photodiode(PPD) and Buried Photodiode(BPD) ?

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Buried Photodiode (BPD) was invented by Yoshiaki Hagiwara at sony in 1975
as a double junction type PNP photodiode.

JP1975-127646.pdf
JP1975-127647.pdf
JP1975-134985.pdf

However, Buried Photodiode(BPD) is not always Pinned Photodiode (PPD).

Buried Photodiode(BPD) may not have the Pinned surface p region.

Buried Photodiode(BPD) may have the serious image lag problem.

Buried Photodiode(BPD) may have the serious surface dark curent

when the surface is completely depleted and has the surface strong electric field


Pinned Photodiode (PPD) was also invented by Yoshiaki Hagiwara at Sony in 1975
in JPA 1975-127646 as a double junction type N+N-P+NP-P Buried Photodiode
and in JPA 1975-127647 as a triple junction type N+N-P+N Buried Photodiode
with the Pinned Surface N+N barrier electric field in the surface electron accumulation region
of the excellent short wave blue light sensitivity,
the very low surface dark current noise, and
the complete charge transfer capability of no image lag feature.

JP1975-127646.pdf

JP1975-127647.pdf

A triple junction type P+NPNsub Pinned Photodiode,
which is a double junction type P+NP Pinned Photodiode in the N type Silicon substrate Nsub,
was also invented in JPA 1975-134985 by Yoshiaki Hagiwara at Sony in 1975
with the built-in vertical overflow drain (VOD) capability.

JP1975-134985.pdf

Electrical Shutter Function Clocking Scheme
of controling the punch thru voltage of the built-in verical overflow drain (VOD)
was also invented in JPA 1975-126885 by Yoshiaki Hagiwara at Sony in 1977
and was applied in the triple junction type P+NPNsub Pinned Photodiode
which was named in 1987 as Hole Accumulation Diode(HAD) by Sony Hamazaki Team .

JP1977-126885.pdf

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JP1977-837_Hitachi_Koike.pdf

JP1978-1971_Toshiba_Yamada_VOD_patent.pdf

JP1980-138026_NEC_Teranishi_Patent.pdf

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P1976_128_bit_Comparator.pdf

P1978_Pinned_Photodiode_1978_Paper_by_Hagiwara.pdf

P1979_CCD79_in_Edinburgh_1979.pdf

P1989_SONY_4MSRAM_1989.pdf

P1996_Pinned_Photodidoe_used_in_Sony_1980_FT_CCD_Image_Sensor.pdf

P2001_ESSCIRC2001.pdf

P2008_ESSCIRC2008Hagiwara.pdf

P2013_ISSCC2013PanelTalk.pdf

P2019_3DIC2019Paper_on_3D_Pinned_Photodiode.pdf

P2020_EDTM2020_PaperID_3C4_by_Hagiwara.pdf

P2020_Pinned_Photodiode_Solar_Cell_1.pdf

P2020_Pinned_Photodiode_Solar_Cell_2.pdf


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Buried_Photodiode_is_not_always_PPD_Hagiwara_Nov_2020.pdf

Difference_of_Pinned_Photodiode_and_Buiried_Photodiode.pdf

E-mail_Communication_on_Sony_Loral_Patent_War_1996.pdf

E-mail_communication_with_Albert_san_and_Yoshi.pdf

Evidence_that_Hagiwara_is_the_inventor_of_Pinned_Photodiode_2020_10_04a.pdf

Evidence_that_Hagiwara_is_the_inventor_of_Pinned_Photodiode_in_Japanese.pdf

Hagiwara_invented_PPD_and_Sony_HAD_in_1975.pdf

Hagiwara_invented_PPD_and_Sony_HAD_in_1975_2020_08_21.pdf

Hagiwara_invented_PPD_and_Sony_HAD_in_1975_Head.pdff

Image_Sensor_Story_07.pdf

Image_Sensor_Story_14.pdf

Origin_of_1975_Concept_of_Pinned_Photodiode.pdf

The_evidence_that_Hagiwara_is_the_inventor_of_Pinned_Photodiode_2020_10_02 .pdf


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Hagiwara_invented_PPD_and_Sony_HAD_in_1975.html

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AIPS Library
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My Wonderful Memory Pictures

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Hagiwara had to defend his 1975 Pinned Photodiode Basic Patents
JPA 1975-127646, JPA 1975-127647 and JPA 1975-134985
from Faircild, NEC and Kodack Patent Attacks
more than 15 years from 1990 till 2015.

Sony won the Farichi/Sony Patent War in 2000.
NEC gave up patent disputes and stopped image sesnor business.
Sony and Kodak made a friendly technical cross liscence mutual agreement.



Sony and Kodak made a friendly technical cross liscence mutual agreement

while NEC gave up patent disputes and stopped image sesnor business..





The chairman of Sony, Mr. Ohga and other Sony Executives were very happy
about the happy result of the Patent War.




















Hagiwara also received the Sony Central Research Center Crystal Award in 1978
for his image sensor time and space spectrum analysis.













Sony_acknowledged_that_Hagiwara_invented_PPD_with_VOD_for_Electric_Shutter_Function
















Prof. Yoshiaki Hagiwara at Sojo University was on TV .

The AIPS Self Driving Cars are on the way in near future.



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hagiwara-yoshiaki@aiplab.com for my activity at http://www.aiplab.com/
hagiwara@ssis.or.jp for my activity at http://www.ssis.or.jp/en/index.html

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