Patent ID: 6374733
Filing Date: 2002-04-23
Classification: H01L,H05K

Abstract:
A method of manufacturing a ceramic circuit board, comprising the steps of:(a) preparing an intaglio by forming a first groove on the surface of a flexible resin base material in a pattern corresponding to a desired conductor pattern, and forming a second groove in a pattern corresponding to the via or bump of the desired conductor pattern, the second groove being deeper than the first groove; (b) providing a conductive paste on said intaglio; (c) filling the first and second grooves with said conductive paste, and defoaming the conductive paste utilizing ultrasonic vibration; (d) drying said conductive paste, wherein conductive paste decreases in volume as a result of being dried; (e) repeating steps (b) through (d) to replace the decreased volume of the conductive paste until the first and second grooves are substantially filled to a predetermined level; (f) adhering said intaglio to a ceramic substrate by pressing said intaglio to the ceramic substrate while applying heat in a specified range; and (g) removing said intaglio from said ceramic substrate, thereby transferring a pattern of conductive paste on the ceramic substrate, and baking the pattern of conductive paste on the ceramic substrate to form a first conductor pattern, wherein the conductive paste is supplied at said steps (b) by using any one of screen mask, metal mask, and drawing device, and said step of defoaming the conductive paste is performed simultaneously with the step of filling the first and second grooves.