US 10,889,078 B2
Optical spacer including controlled located aperture and method of manufacturing the same
Tim Kao, Santa Clara, CA (US); Chia-Yang Chang, Sunnyvale, CA (US); and Livia Li, Santa Clara, CA (US)
Assigned to OmniVision Technologies, Inc., Santa Clara, CA (US)
Filed by OmniVision Technologies, Inc., Santa Clara, CA (US)
Filed on Aug. 5, 2015, as Appl. No. 14/819,103.
Prior Publication US 2017/0036407 A1, Feb. 9, 2017
Int. Cl. B29D 11/00 (2006.01); B29C 33/00 (2006.01); B29C 33/48 (2006.01); B29K 105/00 (2006.01)
CPC B29D 11/00365 (2013.01) [B29C 33/0033 (2013.01); B29C 33/485 (2013.01); B29D 11/00298 (2013.01); B29K 2105/0058 (2013.01); B29K 2105/0097 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method of manufacturing an optical lens assembly including an optical spacer, the method comprising:
dispensing thermal glue within a mold, the mold being disposed on a substrate top-surface of a mold substrate, and including a plurality of pillars, each of the plurality of pillars having (a) a first surface at a first height above the substrate top-surface, (b) a pillar top-surface at a second height above the substrate top-surface that exceeds the first height, (c) a first width at the first height, and (d) a second width at the second height that is less than the first width;
pressing the thermal glue using an optical spacer substrate to generate the optical spacer including an aperture having an aperture-width determined by the second width;
releasing the mold from the optical spacer;
stacking the optical spacer onto a lens plate including plurality of lenses and a lens plate substrate, the aperture being aligned to one lens, of the plurality of lenses, a diameter of the one lens exceeding the aperture-width;
wherein the step of stacking includes adhering a surface of the optical spacer opposite the optical spacer substrate to the lens plate substrate; and
removing the optical spacer substrate to generate the optical lens assembly.