Patent ID: 6184774
Filing Date: 2001-02-06
Classification: G01L

Abstract:
A semiconductor pressure detecting device including a silicon chip having first portions, a central portion between, connected to, and thinner than said first portions, said central portion of said silicon chip including a surface and at least one gauge resistance on the surface, said gauge resistance comprising a piezoresistance element including a laser recrystallized silicon film, said recrystallized silicon film including a connecting portion having edges, and two contacts electrically connected to each other by said connecting portion, said connecting portion of said recrystallized silicon film including at least one subgrain boundary transverse to and intersecting said edges, wherein the surface is a (100) or equivalent surface and said recrystallized silicon film is P-type and is arranged along a (110) direction of said silicon chip, and including respective, spaced apart metallizations disposed on corresponding subgrain boundaries of said recrystallized silicon film, whereby each of the subgrain boundaries in said connecting portion of said recrystallized silicon film between said contacts is short-circuited by a respective metallization.