Patent ID: 6808973
Filing Date: 2004-10-26
Classification: H01L

Abstract:
A manufacturing method of a semiconductor device including a capacitor and insulating gate-type transistors formed in a predetermined base substrate, comprising the steps of:(a) preparing said predetermined base substrate having a first area for forming said capacitor and a second area for forming an insulating gate type transistor; (b) successively depositing a lower-layer electrode-use conductive layer and a dielectric-use insulating film on said predetermined base substrate; (c) patterning said lower-layer electrode-use conductive layer and said dielectric-use insulating film to form a lower-layer electrode and a dielectric film of said capacitor by using a lower-layer electrode-use mask; (d) after said step (c), forming an upper-layer electrode-use conductive layer on said predetermined substrate including said first and second areas; (e) performing a patterning process on said upper-layer electrode-use conductive layer by using an upper-layer electrode-use mask to form an upper-layer electrode of said capacitor in said first area and a gate electrode of said insulating gate type transistor in said second area, wherein said semiconductor device further includes a bipolar transistor formed in said predetermined base substrate, said predetermined base substrate further has a third area for forming a bipolar transistor, said step (d) includes a step of forming said upper-layer electrode-use conductive layer on said predetermined substrate including said first through third areas, and said step (e) further includes a step of performing a patterning process on said upper-layer electrode-use conductive layer by using said upper-layer electrode-use mask to further form said upper-layer electrode-use conductive layer on said third area as a base electrode of said bipolar transistor.