摘要:
A lubricant sheet suitable for use in a process of making a hole in a printed circuit board, which sheet comprises a water-soluble polymer layer, which has a thickness of 0.02 to 3.0 mm, and a metal foil having a thickness of 0.05 to 0.5 mm, said water-soluble polymer layer being formed on one surface of said metal foil, wherein said metal foil is an aluminum foil having an aluminum purity of at least 99.5%.
摘要:
To provide a polishing compound that is capable of minimizing formation of scratches on an object to be polished, such as a resin substrate or a metal wiring, and polishing at a high removal rate. To further provide a polishing method that is capable of minimizing formation of scratches on a resin substrate or a metal wiring, and improving the throughput. The polishing compound T comprises an oxidizing agent, an electrolyte and an aqueous medium, wherein ions formed from the electrolyte comprise ammonium ions, at least one type of organic carboxylate ions selected from the group consisting of polycarboxylate ions and hydroxycarboxylate ions, and at least one type of ions selected from the group consisting of carbonate ions, hydrogencarbonate ions, sulfate ions and acetate ions. A wiring trench 2 is formed in a resin substrate 1, then a wiring metal 3 is embedded in the wiring trench 2, and the wiring metal 3 is polished by using the above-mentioned polishing compound, whereby it is possible to minimize formation of scratches on the metal wiring 3 and to improve the throughput.
摘要:
The invention is directed to a process for patterning ceramic tape wherein a photoresist is applied to a ceramic tape, which enables the photoresist, after being exposed patternwise, and developed, to act as a development mask for the tape. The tape then undergoes a development stage, which ultimately removes undesired sections of tape. The tape contains polymeric binder(s) with acidic or alkaline functional pendant groups but not photosensitive ingredients. Therefore, the tape is aqueous processable but itself cannot be photoimaged. However, when this tape is used with conventional photoresists that have the development chemistry opposite from that of the tape, it allows the photoresist to be used as a development barrier layer for the tape.
摘要:
It is possible to obtain a clean high-quality circuit board by removing affected material and foreign matter produced when a hole is formed. A manufacturing method of the circuit board includes (a) preparing a film-coated board material (51) by bonding a film material (4a,4b) as a mask to a board material (1), (b) forming a hole (10) in the film-coated board material (51) by applying a laser beam (9) thereto, and (c) selectively removing the unnecessary material (11,12) sticking to the film-coated board material (51) from the film-coated board material (51) by supersonic cleaning without peeling the film material (4a,4b) off the board material. After removal of such unnecessary material, a conductive material (14) is disposed in the hole (10), using the film material (4a,4b) as a mask, and the film material (4a,4b) is later removed from the board material (1).
摘要:
There is provided a method for partially plating on a base of synthetic resins or other materials including not only a single base but an assembly thereof comprising a number of chip bases for producing electronic and electric parts such as printed circuit board, lead frame insert molded circuit parts, etc. A method for partially plating on an assembly of bases 21 by the use of a plating catalyst comprising a coating process to coat a surface to be plated or not to be plated by means of a coating material selected from a water soluble polymer or hydrolyzable polymer either before or after a catalyst applying process to soak a container containing bases 21 in a plating catalyst bath.
摘要:
A compact reflow oven and cleaning apparatus combines in a unitary housing for both the reflow and cleaning function. This results in the saving of valuable floor space in the printed circuit board assembly areas. The unitary housing and control of temperatures in the reflow and cleaning areas facilitate the removal of contaminants before solidification of such contaminants.
摘要:
A lubricant sheet suitable for use in a process of making a hole in a printed circuit board, which sheet comprises an organic layer having a thickness of 0.02 to 3.0 mm and formed of a mixture (a) or a mixture (b), and a metal foil having a thickness of 0.05 to 0.5 mm,
said organic layer being formed on one surface of said metal foil, said mixture (a) being a mixture containing 20 to 90 parts by weight of a polyether ester component (I), 10 to 80 parts by weight of a solid water-soluble lubricant (II) and 2 to 10 parts by weight of a polyethylene glycol (III) having a number average molecular weight of 200 to 600, the total amount of the polyether ester component (I) and the solid water-soluble lubricant (II) being 100 parts by weight, and said mixture (b) being a mixture containing 20 to 90 parts by weight of a polyether ester component (I), 10 to 80 parts by weight of a solid water-soluble lubricant (II) and 2 to 20 parts by weight of a liquid water-soluble lubricant (IV), the total amount of the polyether ester component (I) and the solid water-soluble lubricant (II) being 100 parts by weight.
摘要:
A compact reflow oven and cleaning apparatus combines in a unitary housing for both the reflow and cleaning function. This results in the saving of valuable floor space in the printed circuit board assembly areas. The unitary housing and control of temperatures in the reflow and cleaning areas facilitate the removal of contaminants before solidification of such contaminants.