摘要:
An inspection apparatus for a base substrate of a multi-layered board irradiates light to the base substrate of a multilayered board to which a protective film is attached. An image of a surface, to which the protective film is attached, is picturized by a camera, so that an acceptability of a state of a via hole is inspected on the basis of a difference between a light reflectivity of the via hole and a light reflectivity of the protective film. The protective film is colored so as to lower its light reflectivity so that the difference between the light reflectivity of the via hole and that of the protective film is clearly generated. Accordingly, on the basis of the image picturized by the camera, the size of the via hole, dusts therein and the acceptability of the via hole can be accurately inspected.
摘要:
Single-sided conductor patterned films are prepared, each of which has a conductor pattern formed only one side of a resin film and via hole filled with conductive paste. A single-sided conductor patterned film which has a conductor pattern formed only one side of a resin film and an opening formed in the resin film so as to expose an electrode is laminated on the single-sided conductor patterned films. Moreover, a cover layer with an opening to expose an electrode is laminated on a bottom surface of the single-sided conductor patterned films to form a laminate. Then, by pressing while heating the laminate, a multilayer substrate having the electrodes at both sides thereof can be produced.
摘要:
Lands formed on a flexible printed circuit board are electrically connected with lands formed on a rigid printed circuit board through solder. At this point, solder resist is formed between neighboring two lands on the rigid printed circuit board, and is terminated with an end portion that is interposed between the rigid printed circuit board and the flexible printed circuit board. Accordingly, even when surplus solder is extruded onto the rigid printed circuit board, the solder resist can prevent solder bridges from being formed between the lands.
摘要:
A heated and pressed printed wiring board is made by filling via holes formed in layers of insulating film of the wiring board with an interlayer conducting material. The insulating film is stacked with conductor patterns, and each conductor pattern closes a via hole. The interlayer conducting material forms a solid conducting material in the via holes after a heating a pressing procedure. The solid conducting material includes two types of conducting materials. The first type of conducting material includes a metal, and the second type of conductive material includes an alloy formed by the metal and conductor metal of the conductor patterns. The conductor patterns are electrically connected reliably without relying on mere mechanical contact.
摘要:
Single-sided conductor patterned films are prepared, each of which has a conductor pattern formed only one side of a resin film and via hole filled with conductive paste. A single-sided conductor patterned film which has a conductor pattern formed only one side of a resin film and an opening formed in the resin film so as to expose an electrode is laminated on the single-sided conductor patterned films. Moreover, a cover layer with an opening to expose an electrode is laminated on a bottom surface of the single-sided conductor patterned films to form a laminate. Then, by pressing while heating the laminate, a multilayer substrate having the electrodes at both sides thereof can be produced.
摘要:
A heated and pressed printed wiring board is made by filling via holes formed in layers of insulating film of the wiring board with an interlayer conducting material. The insulating film is stacked with conductor patterns, and each conductor pattern closes a via hole. The interlayer conducting material forms a solid conducting material in the via holes after a heating a pressing procedure. The solid conducting material includes two types of conducting materials. The first type of conducting material includes a metal, and the second type of conductive material includes an alloy formed by the metal and conductor metal of the conductor patterns. The conductor patterns are electrically connected reliably without relying on mere mechanical contact.
摘要:
Lands formed on a flexible printed circuit board are electrically connected with lands formed on a rigid printed circuit board through solder. At this point, solder resist is formed between neighboring two lands on the rigid printed circuit board, and is terminated with an end portion that is interposed between the rigid printed circuit board and the flexible printed circuit board. Accordingly, even when surplus solder is extruded onto the rigid printed circuit board, the solder resist can prevent solder bridges from being formed between the lands.
摘要:
In interconnecting printed circuit boards: preparing a first and second printed circuit board is accomplished with the first having an insulating substrate of thermoplastic resin and a conductive pattern with a land, while the second has a conductive pattern with a land; overlapping the land of the first with the land of the second is done to form an interconnection portion; and heating the interconnection portion at a temperature approximately higher than a glass transition temperature of the thermoplastic resin while applying pressure to the interconnection portion to create an electrical interconnection sealed with a part of the thermoplastic resin constituting the insulating substrate of the first board is accomplished. The insulating substrate of the first board is overlapped with an insulating substrate of the second printed board to interpose a film, the film including material to reduce a modulus of elasticity of the insulating substrate of the first board.
摘要:
A plurality of film insulators having conductive patterns that are formed on surfaces and conductive vias that pass through the film insulators in the direction of thickness are stacked together and collectively subjected to pressure and heat to be formed as a single unit. On one outermost layer of the multilayer board that has been thus formed, a plurality of connection terminals are exposed to the outside, connection bumps of an LSI chip being secured to these connection terminals. On the outermost layer of the opposite side, a multiplicity of metal pads are provided, and a solder ball is secured on each metal pad to form a ball grid array (BGA) structure for connecting to a motherboard.
摘要:
In a manufacturing method of a rigid-flexible printed circuit board, slits for defining two sides of a removing portion are formed in a part of plural resin films, and the plural resin films are stacked and bonded to form a circuit board. Then, a product portion is cut from the circuit board. Before the bonding, a separation sheet is disposed between predetermined adjacent layers of the plural resin films to separate the removing portion from a residual portion of the product portion. Accordingly, while the product portion is cut from the circuit board, the removing portion is separated from the product portion, because the removing portion are defined by the separation sheet, the slits, and a cutting outline of the product portion.