H
Hirofumi Sumi
Researcher at Sony Broadcast & Professional Research Laboratories
Publications - 75
Citations - 1133
Hirofumi Sumi is an academic researcher from Sony Broadcast & Professional Research Laboratories. The author has contributed to research in topics: Image sensor & Layer (electronics). The author has an hindex of 18, co-authored 74 publications receiving 1128 citations.
Papers
More filters
Patent
Aluminum metallization method
Hirofumi Sumi,Yukiyasu Sugano +1 more
TL;DR: In this article, a metallization method in which a fine interconnection hole is filled with an Al-based material and in which low resistance and excellent barrier properties may be achieved simultaneously, is proposed.
Journal ArticleDOI
A high-sensitivity CMOS image sensor with gain-adaptive column amplifiers
Masaki Sakakibara,Shoji Kawahito,D. Handoko,Nobuo Nakamura,H. Satoh,M. Higashi,Keiji Mabuchi,Hirofumi Sumi +7 more
TL;DR: In this paper, a high-sensitivity CMOS image sensor using gain-adaptive column amplifiers is presented and tested, and the use of high gain for the column amplifier reduces input-referred random noise, and when coupled with a column-based digital noise cancellation technique, also reduces fixed pattern noise.
Patent
Imaging element, imaging device, camera module and camera system
TL;DR: In this article, a camera module with a through-hole 14 for light transmission, an imaging element 11 flip chip mounted on one side of the substrate such that the light receiving portion 15 is exposed through the throughhole 14, and a shielding layer 22 on the back surface of the element on the opposite side of a light receiving component 15.
Patent
Solid-state image-sensing device and method for producing the same
TL;DR: In this article, a solid-state image-sensing device includes a first-conductivity-type second semiconductor well region formed between a firstconductivity first semiconductor region and the device isolation layer.
Journal ArticleDOI
CMOS image sensors comprised of floating diffusion driving pixels with buried photodiode
Keiji Mabuchi,Nobuo Nakamura,Eiichi Funatsu,Takashi Abe,Tomoyuki Umeda,T. Hoshino,Ryoji Suzuki,Hirofumi Sumi +7 more
TL;DR: In this paper, a floating diffusion (FD) driving pixel with a buried photodiode with three or less transistors, and lowvoltage driving technologies with a new photodiodes structure and FD-boost method are described.