Abstract:
PURPOSE: A method for forming a micro circuit pattern through a residual stress control and a printed circuit board using the same are provided to improve yield and obtain high density by implementing a high etching factor. CONSTITUTION: A first copper foil layer is formed on the upper side of an insulation substrate. The residual stress of a copper layer is offset by applying a tensile force to a copper foil layer before the copper foil layer is etched(S300). A circuit pattern is formed by etching the first copper foil layer and a via hole is formed on the insulation layer by a drill process(S220). A second copper foil layer is formed on the surface of the first copper layer and the inner surface of the via hole by a plating process(S230). The residual stress of the second copper foil layer is offset by applying the tensile force to the second copper foil layer. A micro circuit pattern is formed by etching the first and second copper foil layers.
Abstract:
본 발명은 열방출 효과가 우수한 방열 인쇄회로기판 및 그 제조 방법에 관한 것으로, 절연층의 표면에 동박층이 형성된 동박적층기판(Copper Clad Laminate; CCL)에 마련하는 단계와, 상기 동박적층기판에 드릴링 공정을 수행하여 비아홀을 형성하는 단계와, 비아 플레이팅 도금 공정을 수행하여 상기 비아홀의 측벽에 열방출용 비아(Thermal Via)를 형성하는 단계와, 상기 동박층을 식각하여 회로 패턴을 형성하는 단계 및 상기 회로 패턴 상부에 LED 칩을 포함하는 LED 모듈을 실장하는 단계를 포함하여, 열방출 인쇄회로 기판의 제조 공정을 단순화 하면서도 방열 효율을 극대화 시킬 수 있도록 하는 발명에 관한 것이다.
Abstract:
PURPOSE: A heat radiation printed circuit board with a high heat discharge effect and a manufacturing method thereof are provided to reduce manufacturing costs by previously laminating a thermal via in a CCL(Copper Clad Laminate). CONSTITUTION: A via hole is formed on a CCL(S100). A thermal via is formed in a sidewall of the via hole by a via plating process(S110). A pad for mounting an LED module or circuit pattern is formed(S120). A heat sink is additionally formed on the lower side of a printed circuit board(S130). A pattern is attached to the LED module(S140).