Patent ID: 8865394
Filing Date: 2014-10-21
Classification: H01L

Abstract:
1. Method for covering opaque conductive areas in a self-aligned process comprising the steps of providing a transparent substrate at least partly covered with a first layer stack comprising at least one transparent layer, and a pattern of first and second opaque conductive areas deposited on top of the transparent layer, depositing a photoresist layer made of an electrically insulating photoresist material on top of the first layer stack at least fully covering the second opaque conductive areas, illuminating the photoresist layer through the transparent substrate with light of a suitable wavelength to make the photoresist material soluble in the areas of the photoresist layer having no opaque conductive areas underneath, removing the soluble areas of the photoresist layer, heating the areas of the photoresist layer remaining on top of at least the second opaque conductive areas to re-flow the photoresist layer to cover the edges of the second opaque conductive areas in contact to the transparent layer, and hardening the remaining areas of the photoresist layer.