Patent ID: 11873215
Assignee: STMICROELECTRONICS S.R.L.
Field: Micro-structural and nano-technology (Chemistry)
Classification: CPC B | IPC B

Claim 0:
1. A process, comprising:
manufacturing a plurality of micro electro-mechanical system (MEMS) devices by:
placing a substrate into a molding chamber, the substrate including a plurality of MEMS structures, each of the plurality of MEMS structures including an application specific integrated circuit (ASIC) and a MEMS sensor, the MEMS sensor coupled to the ASIC, and the ASIC coupled to a surface of the substrate, the plurality of MEMS structures are spaced from each other;
after placing the substrate into the molding chamber, placing a plurality of first molds on the surface of the substrate spaced from each other, each of the plurality of first molds covering each of the plurality of MEMS structures and first portions of the surface of the substrate, leaving exposed portions of the surface of the substrate uncovered by the plurality of first molds, the exposed portions between angled sidewalls of adjacent ones of the plurality of first molds, a plurality of first cavities between the substrate and each of the plurality of first molds;
after placing the plurality of first molds, injecting a first coating material in the plurality of first cavities covering the plurality of the MEMS structures;
after injecting the first coating material, curing the first coating material and forming a plurality of first coating regions having a first Young's modulus, the first coating regions being on the first portions of the surface of the substrate and covering the plurality of MEMS structures;
after curing the first coating material, removing the plurality of first molds;
after removing the plurality of first molds, placing a second mold on the substrate, the second mold covering the plurality of first coating regions, the plurality of MEMS structures, and the surface of the substrate, a second cavity between the substrate and the second mold;
after placing the second mold, injecting a second coating material in the second cavity and covering the plurality of first coating regions and the surface of the substrate, the second coating material being rubber;
after injecting the second coating material, curing the second coating material and forming a second coating region having a second Young's modulus, the second coating region has portions in direct contact with the substrate and covers the first coating regions, and wherein the first Young's modulus is higher than the second Young's modulus;
after curing the second coating material, removing the second mold; and
dicing through the substrate and the second coating region portions in direct contact with the substrate to form the plurality of MEMS devices.