Semiconductor integrated circuit for driving the address of a display device
View Patent ↗Wiring of a PDP address driver IC is disclosed which affords an adequate permitted current capacity. In the PDP address driver IC that drives the PDP, a layer, in which a planar high voltage ground wiring layer and a planar high voltage power wiring layer are formed, is provided atop a layer in which planar high voltage ground wiring layers that supply a ground potential to the active element that is formed within the PDP address driver IC and in which planar high voltage power wiring layers that supply a source potential to the active element are formed. Accordingly, the PDP address driver IC can comprise an adequate permitted current capacity while maintaining a compact size and comprising a multiplicity of output bit portions.
1. A semiconductor integrated circuit that drives a display device, wherein an active element is formed in the semiconductor integrated circuit, a plurality of layers are formed in the semiconductor integrated circuit, each layer being formed by arranging a planar first metal wiring layer, formed on a region where the active element is formed, that supplies a first potential supplied from outside to an active element formed in the semiconductor integrated circuit and a planar second metal wiring layer, formed on the region where the active element is formed, that supplies a second potential supplied from outside to the active element and wherein:
the planar shape of the semiconductor integrated circuit is a rectangular shape;
the first metal wiring layer on the lowermost layer of the plurality of layers is disposed on both sides of the semiconductor integrated circuit in the longitudinal direction thereof and the second metal wiring layer on the lowermost layer is disposed on both sides of the semiconductor integrated circuit in the longitudinal direction thereof and adjoining the first metal wiring layer on the outer side of the first metal wiring layer;
the second metal wiring layer on the uppermost layer of the plurality of layers is disposed such that its peripheral edge is positioned, in the longitudinal direction of the semiconductor integrated circuit, at an inner side of the semiconductor integrated circuit than the peripheral edge of the second metal wiring layer on the lowermost layer, the first metal wiring layer on the uppermost layer is disposed on, in the longitudinal direction of the semiconductor integrated circuit, the inner side of the semiconductor integrated circuit than the second wiring layer on the uppermost layer, and a portion or all of the output terminals of the semiconductor integrated circuit are formed on, in the longitudinal direction of the semiconductor integrated circuit, an outer side of the second metal wiring layer on the uppermost layer within a region directly above the region in which the active element is formed.
2. The semiconductor integrated circuit according to claim 1 , wherein:
the first metal wiring layer on the uppermost layer of the plurality of layers is disposed on the center line in the longitudinal direction of the semiconductor integrated circuit and the second metal wiring layer on the uppermost layer surrounds the first metal wiring layer on the uppermost layer.
3. The semiconductor integrated circuit according to claim 2 , wherein the third metal wiring layer is metal wiring that supplies a ground potential to a logic circuit that is formed on the semiconductor integrated circuit and the fourth metal wiring layer is metal wiring that supplies a source potential to a logic circuit that is formed on the semiconductor integrated circuit.
4. The semiconductor integrated circuit according to claim 2 , wherein the circuit constituted by the active element is a high withstand voltage circuit.
5. The semiconductor integrated circuit according to claim 2 , wherein the first potential is the ground potential and the second potential is the source potential.
6. The semiconductor integrated circuit according to claim 1 , wherein:
the first metal wiring layer on the uppermost layer of the plurality of layers is disposed on the center line in the longitudinal direction of the semiconductor integrated circuit and a portion of the second metal wiring layer on the uppermost layer crosses the first metal wiring layer on the uppermost layer on both sides of the first metal wiring layer on the uppermost layer.
7. The semiconductor integrated circuit according to claim 6 , wherein the third metal wiring layer is metal wiring that supplies a ground potential to a logic circuit that is formed on the semiconductor integrated circuit and the fourth metal wiring layer is metal wiring that supplies a source potential to a logic circuit that is formed on the semiconductor integrated circuit.
8. The semiconductor integrated circuit according to claim 6 , wherein the circuit constituted by the active element is a high withstand voltage circuit.
9. The semiconductor integrated circuit according to claim 6 , wherein the first potential is the ground potential and the second potential is the source potential.
10. The semiconductor integrated circuit according to claim 1 , wherein:
the first metal wiring layer on the uppermost layer of the plurality of layers extends within the plane of the semiconductor integrated circuit, the second metal wiring layer on the uppermost layer extends within a region that is surrounded by the first metal wiring layer, a third metal wiring layer on the uppermost layer extends within a region that is surrounded by the second metal wiring layer, and a fourth metal wiring layer on the uppermost layer extends within a region that is surrounded by the third metal wiring layer; and
the third metal wiring layer on the lowermost layer extends between the first metal wiring layers disposed on both sides thereof, and the fourth metal wiring layer on the lowermost layer extends within a region that is surrounded by the third metal wiring layer.
11. The semiconductor integrated circuit according to claim 10 , wherein the third metal wiring layer is metal wiring that supplies a ground potential to a logic circuit that is formed on the semiconductor integrated circuit and the fourth metal wiring layer is metal wiring that supplies a source potential to a logic circuit that is formed on the semiconductor integrated circuit.
12. The semiconductor integrated circuit according to claim 10 , wherein the circuit constituted by the active element is a high withstand voltage circuit.
13. The semiconductor integrated circuit according to claim 10 , wherein the first potential is the ground potential and the second potential is the source potential.
14. The semiconductor integrated circuit according to claim 1 , wherein the circuit constituted by the active element is a high withstand voltage circuit.
15. The semiconductor integrated circuit according to claim 1 , wherein the third metal wiring layer is metal wiring that supplies a ground potential to a logic circuit that is formed on the semiconductor integrated circuit and the fourth metal wiring layer is metal wiring that supplies a source potential to a logic circuit that is formed on the semiconductor integrated circuit.
16. The semiconductor integrated circuit according to claim 1 , wherein the first potential is the ground potential and the second potential is the source potential.