Circuit structure of circuit board and process for manufacturing the same
AssigneeUnimicron Technology Corp.
InventorCheng-Po Yu
Life of this patent
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Abstract
A circuit structure of a circuit board includes a dielectric layer, a number of first circuits, and a number of second circuits. The dielectric layer has a surface and an intaglio pattern. The first circuits are disposed on the surface of the dielectric layer. The second circuits are disposed in the intaglio pattern of the dielectric layer. Line widths of the second circuits are smaller than line widths of the first circuits, and a distance between every two of the adjacent second circuits is shorter than a distance between every two of the adjacent first circuits.
Claims14
A circuit structure of a circuit board, comprising:
- a dielectric layer, having a surface and an intaglio pattern;
- a plurality of first circuits, disposed on the surface of the dielectric layer;
- and
- a plurality of second circuits, disposed in the intaglio pattern of the dielectric layer, wherein line widths of the second circuits are smaller than line widths of the first circuits, and a distance between every two of the adjacent second circuits is shorter than a distance between every two of the adjacent first circuits.
A process for manufacturing a circuit structure of a circuit board, the process comprising:
- providing a dielectric layer having a surface;
- irradiating a portion of the surface of the dielectric layer with use of a laser beam, so as to form an intaglio pattern;
- forming a metal layer on the dielectric layer, wherein the metal layer covers the surface of the dielectric layer and the intaglio pattern;
- and
- performing a photolithography and etching process to form a plurality of first circuits and a plurality of second circuits, wherein the first circuits are disposed on the surface of the dielectric layer, the second circuits are disposed in the intaglio pattern of the dielectric layer, line widths of the second circuits are smaller than line width of the first circuits, and a distance between every two of the adjacent second circuits is shorter than a distance between every two of the adjacent first circuits.
Dependencies are inferred from the claim text.