Abstract:
A method of filling features of a substrate to produce a planar patterned surface on said substrate is disclosed. The method includes the steps of: providing a substrate (2) containing a pattern of features (4) defined by a dielectric material (6), depositing thereon a layer of a conductor (12) whereby first portions of the conductive layer (8) cover the dielectric material, second portions of the conductor layer (10) fill the features, and third sidewall portions (12) of the conductive layer connect the first and second portions; coating the substrate with a resist (16) and patterning the resist with a resist pattern similar to said pattern of features; etching away all portions of the conductor layer, except the second portions filling the features, by etching under conditions such that lateral etching of the sidewall portions of the conductor layer is inhibited; and stripping the resist to result in substrate having a substantially planar patterned surface. Planarized multichip modules and integrated circuits are also disclosed.
Abstract:
The present invention provides an improved method for manufacturing circuit boards with high power, high density interconnects. Printed circuit board technology, integrated circuit technology, and heavy-built electroless plating are combined to produce multilayer circuit boards comprised of substrates with different interconnect densities. In the higher density substrates, thick metallized layers are built-up by combining additive and subtractive techniques. These thicker foils minimize DC voltage drop so that conductors can run for longer distances. The conductors are substantially more square than their thin film equivalents, thus providing better performance for high frequency signals. Power distribution capabilities are enhanced by the present invention, so that circuit boards fully populated with dense, high-speed, high-power integrated circuits (22) can easily be supplied with their necessary power requirements.
Abstract:
A multi-layer interconnect structure of alternating dielectric (e.g., polyimide) (112) and metal (122, 124, 126) (e.g., copper) is built on a substrate (100) supporting a continuous layer of metal (106). This metal layer (106) is used as an electrode for plating vias (118) through all the dielectric layers (112). Once the desired number of layers are formed, the substrate (112) is removed and the continuous metal layer (106) is patterned. Solid metal vias (118) having nearly vertical side walls can be stacked vertically, producing good electrical and thermal transfer paths and permitting small, closely-spaced conductors. Further, by mixing geometrical shapes of conductors, a variety of useful structures can be achieved, such as controlled impedance transmission lines and multiconductor TAB tape with interconnects on tape of different dimensions from TAB fingers (252).
Abstract:
An electrical assembly which has a multi-layer conformal coating on at least one surface of the electrical assembly, wherein each layer of the multi-layer coating is obtainable by plasma deposition of a precursor mixture comprising (a) one or more organosilicon compounds, (b) optionally O 2 , N 2 O, NO 2 , H 2 , NH 3 , N 2 , SiF 4 and/or hexafluoropropylene (HFP), and (c) optionally He, Ar and/or Kr. The chemistry of the resulting plasma-deposited material chemistry can be described by the general formula: SiO x H y C z F a N b . The properties of the conformal coating are tailored by tuning the values of x, y, z, a and b.
Abstract:
알루미늄을 이용하여 방열 및 휨 강도를 증가시킬 수 있는 인쇄회로기판 및 그 제조방법이 개시된다. 인쇄회로기판은, 절연체 재질의 절연층, 상기 절연층의 양측면 상에 접합 형성되고 표면에 회로 패턴이 형성된 알루미늄 재질의 베이스층, 상기 베이스층을 상기 절연층에 접합시키기 위해서 개재되는 접합 부재를 포함하여 형성된 양면 기판, 상기 양면 기판에서 상기 베이스층 상에 형성된 제2 절연층, 상기 제2 절연층 상에 제2 접합부재를 이용하여 접합되는 제2 베이스층, 상기 양면 기판 및 상기 제2 절연층과 상기 제2 베이스층을 관통하여 형성되는 비아홀, 상기 제2 베이스층의 표면과 상기 비아홀 내부로 노출된 부분을 아연화시키는 표면 처리하여 형성된 치환층, 상기 치환층 상에 형성되는 도금층 및 상기 도금층 상에 형성되는 제2 회로 패턴을 포함하여 구성된다.
Abstract:
Substrat verrier à propriétés optiques améliorées pour dispositifs optoélectroniques, tel que ledit substrat est texturé, par attaque chimique, totalement ou partiellement sur au moins une de ses faces par un ensemble de motifs géométriques tel que l'arctangente du rapport entre la hauteur moyenne des motifs, R z , et la moitié de la distance moyenne séparant les sommets de deux motifs contigus, R Sm , est au moins égal à un angle de 35° et au plus égal à un angle de 80°.
Abstract:
A method is for making an electronic device and includes forming an interconnect layer stack on a sacrificial substrate and having a plurality of patterned electrical conductor layers, and a dielectric layer between adjacent patterned electrical conductor layers. The method also includes laminating and electrically joining through an intermetallic bond a liquid crystal polymer (LCP) substrate to the interconnect layer stack on a side thereof opposite the sacrificial substrate. The method further includes removing the sacrificial substrate to expose a lowermost patterned electrical conductor layer, and electrically coupling at least one first device to the lowermost patterned electrical conductor layer.