Patent ID: 8183077
Filing Date: 2012-05-22
Classification: G01L

Abstract:
1. A method of fabrication of 3-dimensional force input control device comprising the steps of: providing a first substrate having side one and side two; fabricating stress-sensitive IC components and signal processing IC on the side one of the first substrate; fabricating one or more closed trenches on the side two of the first substrate within each of a plurality of die areas, said one or more closed trenches creating, within each of the plurality of die areas, elastic element, frame area and a rigid island separated from the frame area; providing a second substrate having side one and side two; patterning side two of the second substrate to define areas for deep etching; creating a layer of bonding material in local areas on at least one of the surfaces of the side one of the second substrate and the side two of the first substrate; aligning and bonding the side two of the first substrate with the side one of the second substrate; etching the second substrate from the side two through to the first substrate, forming a rigid force-transferring element bonded to the rigid island within each of the plurality of die areas; dicing the bonded first and second substrates into multiple separate dice, whereby the bonded first and second substrates are processed, aligned, bonded and diced resulting in batch fabricated low cost 3D force input control devices.