Patent ID: 9630835
Date: 2017-04-25
CPC Classifications: B81B,B81C

Claim:
1. A method of forming a first MEMS device, comprising the steps of: forming a scribe line in a substrate, wherein the scribe line separates an area for said first MEMS device from an area for a second MEMS device; forming a first component of the first MEMS device on a top surface of the substrate in the area for the first MEMS device; forming a second component for the second MEMS device on the top surface of the substrate in the area for the second MEMS device; applying a lower polymer layer to the top surface of the substrate; patterning the lower polymer layer to form a first headspace wall on the substrate in the area for the first MEMS device surrounding the first component and to form a second headspace wall on the substrate in the area for the second MEMS device surrounding the second component; applying an upper polymer dry film to the first headspace wall and the second headspace wall; patterning the upper polymer dry film to form a first headspace cap on the first headspace wall in the area for the first MEMS device and to form a second headspace cap on the second headspace wall in the area for the second MEMS device, so that the first headspace cap and the first headspace wall isolate the first component of the first MEMS device and the second headspace cap and the second headspace wall isolate the second component of the second MEMS device; and singulating the first MEMS device from the second MEMS, wherein the step of patterning the lower polymer layer includes forming a first pillar inside the first headspace wall and separate from the first headspace wall and a second pillar inside the second headspace wall and separate from the second headspace wall.