Patent ID: 11906375
Assignee: PIEZO-METRICS INC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for forming a first plurality of strain gages, the method comprising:
providing a semiconductor-on-insulator substrate comprising a device layer, a handle substrate, and a buried-oxide layer, wherein the device layer has a first thickness, and wherein the device layer comprises a first material having a first resistivity;
forming a first plurality of contact pairs, the contacts of each contact pair being electrically connected through the device layer;
determining a desired range for a gage resistance for the first plurality of strain gages;
providing a plurality of mask sets for defining a first plurality of bodies such that each body includes a different contact pair of the first plurality thereof, wherein each mask set of the plurality thereof includes a plurality of features for defining the first plurality of bodies, and wherein the features of each mask set of the plurality thereof have at least one lateral dimension that is different that the features of the other mask sets of the plurality thereof;
for each of the plurality of mask sets, generating a gage-resistance estimate for each strain gage of the first plurality thereof based at least in part on the at least one lateral dimension;
selecting a first mask set from the plurality of mask sets based on the plurality of gage-resistance estimates and the desired range for the gage resistance;
etching the device layer using the first mask set to define the first plurality of bodies; and
releasing the first plurality of bodies from the handle substrate by removing at least a portion of the buried-oxide layer.