Patent ID: 6861276

Claim:
A method for fabricating a single chip multiple range pressure transducer device from a wafer including first and second oppositely disposed sides, said method comprising the steps of: identifying a plurality of operating ranges for said device; determining a plurality of sets of dimensions, each of said sets defining a corresponding active area of said wafer being respectively associated with one of said operating ranges; forming a plurality of piezoresistive circuits, each of said circuits being formed on said first side of said wafer and at least partially over a corresponding one of said active areas; and, simultaneously thinning said plurality of active areas starting from said second side of said wafer, each of said active areas having a substantially identical minimum thickness such that it deflects in response to an applied pressure so as to output a signal indicative of such applied pressure from said corresponding piezoresistive circuit over said respectively associated one of said operating ranges, wherein said step of thinning further simultaneously provides at least one fixed region between at least two of said active areas.