Monolithic semiconductor device having CCD, bipolar and MOS stru

Details Monolithic semiconductor device having CCD, bipolar and MOS stru Monolithic semiconductor device having CCD, bipolar and MOS stru

1990-05-18

1991-02-19

Munson, Gene M.

357 24, 357 48, 357 89, H01L 2702, H01L 2704, H01L 2978

Patent

active

049948881

ABSTRACT:
A semiconductor device comprising a semiconductor chip formed of a substrate of a first conductivity type and an epitaxial layer of the first conductivity type formed on the substrate, a charge transfer device section formed in the epitaxial layer and driven by a given clock, and a preset region of a second conductivity type formed adjacent to the charge transfer device section in the semiconductor ship. The preset region includes a first layer of the second conductivity type formed in a boundary portion between the substrate and the epitaxial layer, a second layer of the second conductivity type formed on the first layer the epitaxial layer, and a third layer of the second conductivity type formed on the second layer in the epitaxial layer to reach the surface of the substrate. The maximum value of the second conductivity type impurity concentration of the third layer is set smaller than the maximum value of the second conductivity type impurity concentration of the first layer. A bipolar transistor section is formed in the third layer.

REFERENCES:
patent: 4152715 (1979-05-01), Wang
patent: 4314857 (1982-02-01), Aitken
patent: 4799098 (1989-01-01), Ikeda et al.
patent: 4859624 (1989-08-01), Goto
patent: 4912054 (1990-03-01), Tomassetti
Russell A. Martin, "Optimized Retrograde N-Well for 1-.mu. CMOS Technology", IEEE Journal of Solid-State Circuits, vol. 21, Apr. 1986, pp. 286-292.

Affiliated with

Also associated with

Rating

Monolithic semiconductor device having CCD, bipolar and MOS stru does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Monolithic semiconductor device having CCD, bipolar and MOS stru, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Monolithic semiconductor device having CCD, bipolar and MOS stru will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1148084