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

Claim 5:
6. A process comprising the following steps in this order:
coupling a MEMS structure to a surface of a substrate, the MEMS structure coupled to an application specific integrated circuit (ASIC) coupled to a MEMS sensor;
forming a first coating region on first portions of the surface of the substrate and over the MEMS structure, the first portions of the substrate adjacent to the MEMS structure, the first coating region having a first Young's modulus, wherein forming the first coating region comprises:
placing the substrate into a molding chamber;
arranging a first molding matrix having angled sidewalls on the first portions of the surface of the substrate spaced from the MEMS structure, the first molding matrix covering the MEMS structure, a first molding cavity between the MEMS structure and the first molding matrix;
injecting a first coating material into the first molding cavity; curing the first coating material by exposing the first coating material to a first curing temperature for a first time period and forming the first coating region; and
removing the first molding matrix; and

forming a second coating region over the first coating region, the second coating region having a second Young's modulus, wherein forming the second coating region comprises:
arranging a second molding matrix on second portions of the surface of the substrate spaced from the first coating region, the second molding matrix covering the first coating region, a second molding cavity between the first coating region and the surface of the substrate;
injecting a second coating material into the second molding cavity;
curing the second coating material by exposing the second curing material to a second curing temperature for a second time period; and
removing the second molding matrix;

wherein the first Young's modulus is higher than the second Young's modulus.