Liquid crystal display device comprises a light-blocking layer and a plurality of data lines which have a width that is larger than the width of a semiconductor layer

A liquid crystal display device comprising:

• a plurality of scanning signal lines extending in a direction on a substrate;
• a first insulating film covering said plurality of scanning signal lines;
• a plurality of data lines extending on said first insulating film in such a manner as to intersect said plurality of scanning signal lines;
• a plurality of transparent pixel electrodes disposed at intersections of said plurality of scanning signal lines and said plurality of data lines;
• a plurality of thin film transistors each associated with one of said plurality of pixel electrodes, an output electrode thereof being connected to one of said plurality of pixel electrodes, a control electrode thereof being connected to one of said plurality of scanning signal lines, and an input electrode thereof being connected to one of said plurality of data lines;
• and
• a second insulating film disposed between said plurality of pixel electrodes and said plurality of thin film transistors;
• wherein a light-blocking member including a metal is disposed between said substrate and said first insulating film in such a manner as to cover spacing between said plurality of pixel electrodes and said plurality of data lines adjacent thereto;
• and
• wherein a semiconductor layer is interposed between said first insulating film and a portion of said plurality of data lines overlying said light-blocking member for increasing spacing between the data lines and the light-blocking member to reduce electro-static coupling between the data lines and the light-blocking member, wherein a width of said plurality of data lines is larger than that of said semiconductor layer.

A method of making a liquid crystal display device, said liquid crystal display device comprising:

• a plurality of scanning signal lines extending in a direction on a substrate;
• a first insulating film covering said plurality of scanning signal lines:
• a plurality of data lines extending on said first insulating film in such a manner as to intersect said plurality of scanning signal lines;
• a plurality of transparent pixel electrodes disposed at intersections of said plurality of scanning signal lines and said plurality of data lines;
• a plurality of thin film transistors each associated with one of said plurality of pixel electrodes, an output electrode thereof being connected to one of said plurality of pixel electrodes, a control electrode thereof being connected to one of said plurality of scanning signal lines, and an input electrode thereof being connected to one of said plurality of data lines;
• and
• a second insulating film disposed between said plurality of pixel electrodes and said plurality of thin film transistors;
• wherein a light-blocking member made of a metal is disposed between said substrate and said first insulating film in such a manner as to cover spacing between said plurality of pixel electrodes and said plurality of data lines adjacent thereto;
• and
• a semiconductor layer is interposed between said first insulating film and a portion of said plurality of data lines overlying said light-blocking member;
• said method comprising the steps of:
• etching a transistor semiconductor layer underlying said output electrode in said plurality of thin film transistors using a photoresist mask formed on said transistor semiconductor layer such that an etched end of said transistor semiconductor layer on a side of said output electrode extends beyond an end of said output electrode;
• and
• etching an end of said semiconductor layer underlying said plurality of data lines using a metal film making up said plurality of data lines as a mask.

A liquid crystal display device comprising:

• a plurality of scanning signal lines extending in a direction on a substrate;
• a first insulating film covering said plurality of scanning signal lines;
• a plurality of data lines extending on said first insulating film in such a manner as to intersect said plurality of scanning signal lines;
• a plurality of transparent pixel electrodes disposed at intersections of said plurality of scanning signal lines and said plurality of data lines;
• a plurality of thin film transistors each associated with one of said plurality of pixel electrodes, an output electrode thereof being connected to one of said plurality of pixel electrodes, a control electrode thereof being connected to one of said plurality of scanning signal lines, and an input electrode thereof being connected to one of said plurality of data lines;
• and
• a second insulating film disposed between said plurality of pixel electrodes and said plurality of thin film transistors;
• wherein a light-blocking member including a metal is disposed between said substrate and said first insulating film in such a manner as to cover spacing between said plurality of pixel electrodes and said plurality of data lines adjacent thereto;
• and
• wherein a semiconductor layer is interposed between said first insulating film and a portion of said plurality of data lines overlying said light-blocking member;
• wherein the width of said light-blocking member is larger than that of said semiconductor layer.

A liquid crystal display device comprising:

• a plurality of scanning signal lines extending in a direction on a substrate;
• a first insulating film covering said plurality of scanning signal lines;
• a plurality of data lines extending on said first insulating film in such a manner as to intersect said plurality of scanning signal lines;
• a plurality of transparent pixel electrodes disposed at intersections of said plurality of scanning signal lines and said plurality of data lines;
• a plurality of thin film transistors each associated with one of said plurality of pixel electrodes, an output electrode thereof being connected to one of said plurality of pixel electrodes, a control electrode thereof being connected to one of said plurality of scanning signal lines, and an input electrode thereof being connected to one of said plurality of data lines;
• and
• a second insulating film disposed between said plurality of pixel electrodes and said plurality of thin film transistors;
• wherein a light-blocking member including a metal is disposed between said substrate and said first insulating film in such a manner as to cover spacing between said plurality of pixel electrodes and said plurality of data lines adjacent thereto;
• and
• wherein a semiconductor layer is interposed between said first insulating film and a portion of said plurality of data lines overlying said light-blocking member;
• wherein a width of said plurality of data lines is larger than that of said semiconductor layer.