Solid state image pickup device and method of producing...

Active solid-state devices (e.g. – transistors – solid-state diode – Non-single crystal – or recrystallized – semiconductor... – Field effect device in non-single crystal – or...

Reexamination Certificate

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C257S204000

Reexamination Certificate

active

10954788

ABSTRACT:
Forming a back-illuminated type CMOS image sensor, includes process for formation of a registration mark on the wiring side of a silicon substrate during formation of an active region or a gate electrode. A silicide film using an active region may also be used for the registration mark. Thereafter, the registration mark is read from the back side by use of red light or near infrared rays, and registration of the stepper is accomplished. It is also possible to form a registration mark in a silicon oxide film on the back side (illuminated side) in registry with the registration mark on the wiring side, and to achieve the desired registration by use of the registration mark thus formed.

REFERENCES:
patent: 5663555 (1997-09-01), Miyawaki et al.
patent: 5712497 (1998-01-01), Watanabe et al.
patent: 5856699 (1999-01-01), Hayashi et al.
patent: 6150676 (2000-11-01), Sasaki
patent: 6518085 (2003-02-01), Wang et al.
patent: 6690423 (2004-02-01), Nakamura et al.
patent: 2004/0007722 (2004-01-01), Narui et al.

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