Patent ID: 8987024
Filing Date: 2015-03-24
Classification: H01L

Abstract:
1. A method for depositing a phosphor layer on a semiconductor wafer comprising: obtaining a light emitting diode (“LED”) wafer having a first surface and a second surface, the first surface containing a plurality of LED dies wherein electrical contacts of the plurality of LED dies are exposed on the first surface; attaching the second surface of the LED wafer, wherein the second surface of the LED wafer is opposite from the first surface of the LED wafer, to a support carrier wafer, wherein attaching the LED wafer to the support carrier wafer includes utilizing a thermal releasing adhesive layer; depositing a photo-resist layer on the first surface of the LED wafer; removing portions of the photo-resist layer to expose portions of the first surface of the LED wafer while remaining portions of the photo-resist layer form photo-resist posts covering electrical contacts of the LED dies; and depositing a phosphor layer on the exposed portions of the first surface of the LED wafer surrounding circumference of the photo-resist posts.