Patent ID: 7312840
Filing Date: 2007-12-25
Classification: G02B,G02F

Abstract:
1. An active matrix liquid crystal display device, comprising: a first substrate and a second substrate, at least one of said first substrate and said second substrate being transparent; a plurality of scanning lines formed on said first substrate; a plurality of signal lines formed on said first substrate crossing said scanning lines in a matrix manner; a plurality of thin film transistors, each said thin film transistor respectively formed at an intersection of said scanning lines and said signal lines, each said thin film transistor comprising: a passivation film formed on said thin film transistors; at least one color filter formed on said first substrate, a color film forming said at least one color filter additionally covering said passivation film; a plurality of pixel electrodes, each respectively connected to one of said thin film transistors through a contact hole and each respectively formed on one of said at least one color filter; a counter electrode formed on said second substrate; and a liquid crystal layer between said first substrate and said second substrate, said liquid crystal layer being driven by electric fields between said pixel electrodes and said counter electrode to thereby make a display, wherein said color filter is formed directly on said first substrate in substantially all of a light transmission region within a pixel area surrounded by said scanning lines and said signal lines, a thickness of said color film forming said color filter being a preselected first thickness that provides a sufficient chromaticity for said color filter, and said passivation film provides an additional layer over said thin film transistors that reduces a thickness of material of said color filter near said contact hole to a second predetermined thickness chosen to permit a photo-crosslinkage to occur in an entire thickness of said second thickness of said color filter material during an exposure processing for said contact hole to allow a small dimension for said contact hole formed through said color filter material, wherein a width dimension of said contact hole is no more than approximately 5 μm.