Abstract:
A liquid crystal display (LCD) has an LED substrate comprising a base layer (10), a heat conductive layer (11), an electrical conductive layer (12) and a light emitting diode (13). With the substrate, heat is well dissipated. The substrate can be easily manufactured. And, thus, the cost for the LCD is reduced.
Abstract:
A release layer paste used for producing a multilayer electronic device, used in combination with an electrode layer paste including terpineol, dehydroterpineol, terpineol acetate, or dehydroterpineol acetate and including a ceramic powder, organic vehicle, plasticizer, and dispersion agent, the organic vehicle containing a binder having polyvinyl acetal as its main ingredient, a ratio (P/B) of the ceramic powder and the binder and plasticizer being controlled to 1.33 to 5.56 (however, excluding 5.56).
Abstract:
A multilayered printed circuit board comprising: a substrate (330) on which a conductive circuit (334) is formed; an interlayer insulating resin layer (350) formed on the conductive circuit (334); an opening (348) for forming a via hole (360) formed in the interlayer insulating resin layer (350); and another conductive circuit (358) including a via hole (360) and formed on the interlayer insulating resin layer (350), wherein the surface of the conductive circuit (334) is subjected to a coarsening process using etching solution containing cupric complex and organic acid, and stripe pits and projections are formed on the inner wall of the opening (348) for forming the via hole (360).
Abstract:
An inductor element containing circuit board (1) of the present invention comprises a plurality of conductive layers, and a conductor having an inductor function (inductor conductor segment, 21) in one or more of the conductive layers, wherein at least part of the inductor conductor segment (21) is made thicker than other conductors disposed within the circuit board (1). The at least part of the inductor conductor segment (21) extends through an insulating layer (11-17) disposed between the conductive layers, or is embedded in the insulating layer (11-17), wherein the part of the inductor conductor segment (21) has a thickness one-half or more the thickness of the insulating layer (11-17). A power amplifier module (100) of the present invention comprises the multi-layer circuit board (1), a semiconductor amplifier fabricated in the multi-layer circuit board (1), and an impedance matching circuit coupled to the output of the semiconductor amplifier. The impedance matching circuit has a portion thereof formed of the inductor conductor segment (21).
Abstract:
A circuit substrate for attachment to an integrated circuit chip comprises an electrical trace, a mounting pad and a dielectric layer. The mounting pad has a first surface, one or more sidewalls and a second surface. The first surface is attached to the electrical trace. The dielectric layer substantially covers the one or more sidewalls of the mounting pad and has an uppermost surface that is substantially coplanar with the second surface of the mounting pad.
Abstract:
The board includes a ceramic substrate (112) and a wiring pattern (114) disposed as an electrode layer on the substrate. The wiring pattern has gaps (120) filled with an insulating layer (122) made of cermet. The cermet layer contains a material of the electrode layer. Independent claims are also included for the following: (a) a method of manufacturing a wiring board.
Abstract:
A wiring board (110A) has a ceramic substrate (112) and a first wiring pattern (114) disposed on it, gaps (120) of the wiring pattern being filled with a cermet insulating layer (122). There may be a piezoelectric/electrostrictive layer (116) and a cermet second wiring pattern (118) successively. In a method, a first cermet layer (130) to be the first wiring pattern (114) and a second cermet layer (132) to be the insulating layer (122) filling gaps (120) in the first wiring pattern (114) are formed on a ceramic substrate (112). Thereafter, the first cermet layer (130) and the second cermet layer (132) are fired to product the first wiring pattern (114) and the insulating layer (122) simultaneously. Then, a PZT paste (134) may be formed and thereafter fired to produce the piezoelectric/electrostrictive layer (116). Thereafter, a third cermet layer (136) may be formed and thereafter fired to produce the second wiring pattern (118).
Abstract:
A method for manufacturing a microelectronic assembly to have a resistor (12) on a circuit board (10). The method entails applying a photosensitive dielectric to a substrate (18) to form a dielectric layer. The dielectric layer is photoimaged to polymerize a first portion (22). An electrically resistive film (14) is then applied to the dielectric layer and the dielectric layer is developed so that a portion of the resistive film remains over the second portion to form the resistor. A second dielectric layer (32) is then applied, photoimaged and developed to form openings (34). Terminations (16) can then be formed in the openings by known plating techniques. The resistive film is preferably a multilayer film that includes an electrically resistive layer, such as NiP, NiCr or other nickel alloy and a sacrificial backing such as a layer of copper.
Abstract:
To provide a simplified method of making a multi-layer circuit board capable of observing a high density surface mounting of electronic parts, a method is provided for making a multi-layer circuit board including a first film (A) and at least two more films, second and third films (B and C), each being made of thermoplastic polymer capable of forming an optically anisotropic melt phase. The first film (A) has a low melting point (Tm 1 ), and the second and third films (B and C) have respective melting points (Tm 2 B and Tm 2 C) higher than the melting point (Tm 1 ) of the first film (A). And at least one of the second and the third films have a circuit pattern thereon. The first to third films (A to C) are thermo compressed together with the first film (A) interposed between the second and third films (B and C). The method includes causing at least one of the circuit patterns (D) on one of the second and third films (B and C) to contact an opposing surface of the other of the second and third films (B and C) through the first film (A) during the thermo compression bonding of the first to third films (A to C).
Abstract:
Disclosed is a simplified, inexpensive method for producing printed circuit boards and/or corresponding constructs comprising points where through-connections are created. Such a method dispenses with the need for a very complex brushing process while using exclusively low-cost lacquer variants. Moreover, the inventive method allows additional strip conductors or appropriate layers to be guided even directly across the through-connections rather than just to said through-connections..