摘要:
A method of manufacturing an organic substrate used for printed circuits, which includes the steps of forming through-holes (3) in a porous raw material (2) provided with free tackness films (1) and having compressive shrinkage, filling electro-conductive paste (4) into the through-holes (3), separating the free tackness films (1) from the porous raw material (2) filled with the electro-conductive paste (4) in its through-holes (3), applying metal foils (5) onto the surfaces of the porous raw material (2) from which the free tackness films (1) have been separated, and compressing the porous raw material (2) applied with the metal foils (5) through heating and pressurization, whereby the electro-conductive substances in the electro-conductive paste (4) are connected for electrical connection between the metal foils (5).
摘要:
A printed circuit board has: a base material layer having a first via hole; and an insulating layer having a second via hole, the insulating layer being provided on one surface of the base material layer, wherein a cross-sectional area of the second via hole is smaller than a cross-sectional area of said first via hole, and wherein the first and second via holes are filled with a conductive material.
摘要:
A printed circuit board has: a base material layer having a first via hole; and an insulating layer having a second via hole, the insulating layer being provided on one surface of the base material layer, wherein a cross-sectional area of the second via hole is smaller than a cross-sectional area of said first via hole, and wherein the first and second via holes are filled with a conductive material.
摘要:
A carrier substrate (108) comprises a flexible insulating substrate (101) containing aramid fiber as a reinforcer, first bonding pads (102) formed on one side of the flexible insulating substrate (101), and second bonding pads (105) formed on the other side of the flexible insulating substrate (101), where the first bonding pads (102) and the second bonding pads (105) are electrically bonded by via-holes (103) punched in the flexible insulating substrate (101). The carrier substrate (108) and a peripheral stiffener (106) made of a material whose thermal expansion coefficient is higher than that of the carrier substrate (108) compose a chip carrier, and an LSI chip (201) is mounted on the recess of the chip carrier.
摘要:
Disclosure is given for methods of effectively forming a metal-backed layer and an anode using a metal film transferring sheet in which micro-holes are formed. A the metal film transferring sheet is structured by forming a metal film on a mold-releasable, highly characteristic sheet. Then, the metal film having micro-holes of the metal film transferring sheet is transferred onto a phosphor screen. Or, on the metal film of the above-mentioned metal film transferring sheet is formed a phosphor screen and these metal film, phosphor screen, etc. are collectively transferred onto a face plate thereby to form an anode of a cathode-ray tube. Then the disclosed methods are applied for making phosphor products for example, a cathode-ray tube or a plasma display. There is no need to use a large-scaled manufacturing facility and high quality, low-in-cost products are obtainable.