Patent ID: 8993443
Filing Date: 2015-03-31
Classification: H01L,H01M,Y02E,Y02P

Abstract:
1. A method of laser direct patterning a thin film device by a laser beam for selective removal of dielectric and/or semiconductor layers, comprising: providing a thin film device comprising: laser direct patterning said thin film device, said laser beam removing a laser irradiated portion of said second device layer while leaving said first device layer intact, wherein said laser beam passes through said second device layer before reaching said first light blocking layer; wherein said first light blocking layer is a layer of metal that absorbs or reflects a portion of the laser energy penetrating through said second device layer toward said first device layer and said first heat blocking layer is a conductive layer with thermal diffusivity, D, low enough to reduce heat flow into said first device layer from said second device layer such that the temperature of said first device layer does not reach the melting temperature, Tm′, of said first device layer during laser direct patterning.