Screen printing process for light emitting base layer

摘要

The present invention provides a method and system for selectively depositing light emitting film on a light emitting base layer, such as phosphors in a silicon gel carrier on a light emitting diode (LED). The combination of light emitting film and light emitting base layer are selected to give the desired light color, such as white light. The screen printing method comprises applying a photoresist layer to a base layer, masking the photoresist layer, irradiating the photoresist layer through the mask to make a soluble portion and insoluble portion, dissolving the soluble portion to reveal the base layer, and applying a light emitting film to the base layer where the soluble portion was removed. The base layer is then sawn to form LED chips or LED lamps.