Abstract:
A 3D circuit module which is highly reliable, easily layered and able to mount electronic components in high density is obtained by providing a support member having a frame in the periphery thereof and a recess; a coating layer for coating the frame and filling in the recess, the coating layer being made of resin material which is adhesive and has a softening temperature lower than the softening temperature of the support member; a wiring pattern formed on the coating layer, the wiring pattern including a first land on the frame, a second land on the recess, and a wiring part for connecting between the first land and the second land; and an electronic component having a projecting electrode formed on a side thereof, the electronic component being bonded to the coating layer and accommodated in the recess, with the projecting electrode connected to the second land.
Abstract:
PROBLEM TO BE SOLVED: To provide a multilayer wiring substrate with high reliability in connection between via conductors and conductor layers. SOLUTION: A multilayer wiring substrate includes resin dielectric layers 81, conductor layers 84, via conductors 91, and projecting portions 85. The resin dielectric layers 81 individually have via holes 90 formed therein and extending through a first surface 82 and a second surface 83. The conductor layers 84 are formed of conductive metals material and disposed on the first surface 82 of the resin dielectric layers 81. The via conductors 91 are disposed in the respective via holes 90 and electrically connected to the respective conductor layers 84. The projecting portions 85, in a part of the conductor layers 84, are bent toward the back surface of the multilayer wiring substrate, projected from opening edges of the respective via holes 90 toward center axes thereof, and penetrate the respective via conductors 91. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
In a method of manufacturing a thermally conductive circuit board with high heat dissipation, high conductivity and high ground-connection, a sheet-like thermally conductive resin composition containing 70 to 95 wt. % inorganic filler and 5 to 30 wt. % thermosetting resin composition, a lead frame as a wiring pattern, and an electrically conductive heat sink with a metal pole placed therein are superposed, heated and compressed, and thus are combined to form one body. Consequently, a thermally conductive circuit board with a flat surface is obtained in which a grounding pattern is grounded to the heat sink inside the insulating layer. Thus, the grounding pattern and the heat sink can be connected electrically with each other in an arbitrary position inside the insulating layer of the thermally conductive circuit board. The method provides that a part of a lead frame and heat sink are connected not only mechanically, but also electrically, and allows an associated power module size to be reduced and its density to be increased.
Abstract:
PROBLEM TO BE SOLVED: To provide a circuit board through-hole processing method whereby through-holes can be formed to the circuit board in a way that no metal plating is exfoliated from the through-holes in the case of inserting a press-fit contact to them while suppressing the wear amount of a tool to the utmost. SOLUTION: The circuit board through-hole processing method processes through-holes in a drilling manner formed to the printed circuit board PCB and to each of which a press-fit contact 101 formed with a conductor 51 is inserted. The method includes a step of applying chamfering processing to corner edges of each through-hole 50 after the conductor 51 is formed. The chamfering processing is executed by depressing a tool 37 with a sharp head. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
안테나 시트의 제조 방법은, 열가소성 수지를 형성 재료로 하는 기판의 한쪽 면에 설치되며 금속 재료를 형성 재료로 하는 안테나 코일 및/또는 접속 패턴과, 기판의 다른 쪽 면에 설치된 금속 재료를 형성 재료로 하는 도전 부재와의 겹침 부분을, 압압 수단을 이용하여, 기판의 적어도 한쪽 면으로부터 압압하는 프레스 공정과, 안테나 코일 및/또는 접속 패턴과, 도전 부재와의 겹침 부분을 용접하는 용접 공정을 갖는다.
Abstract:
기재를 구성하는 수지 필름의 유전율을 작게 함으로써 Q값을 보다 높이는 것이 가능한 IC카드ㆍ태그용 안테나 회로 구성체와 IC카드를 제공한다. IC카드ㆍ태그용 안테나 회로 구성체(10)는 수지 필름으로 이루어지는 기재(11)와, 기재(11)의 양면의 위에 형성된 알루미늄박으로 이루어지는 회로 패턴층(131과 132)을 구비한다. 회로 패턴층(131)이 코일상의 패턴층을 포함한다. 서로 대향하는 회로 패턴층(131과 132)의 일부와, 회로 패턴층(131, 132)의 일부의 사이에 개재하는 기재(11)의 일부가 커패시터를 구성한다. 회로 패턴층(131과 132)은 압착부(13a, 13b)에서 도통하도록 전기적으로 접속되어 있다. 기재(11)는 복수의 보이드상 공기층을 함유한다. 수지의 밀도에 대한 기재(11)의 상대 밀도가 0. 9 이하이다. 보이드상 공기층의 평균 체적이 2㎛ 3 이상 90㎛ 3 이하이다.