摘要:
An outer lead of a metal lead frame is connected to an inner lead of a flexible lead-patterned substrate via a Au-Sn alloy layer. The Au-Sn alloy layer contains Au of 10 to 40 weight %.An inner lead of a metal lead frame is connected to a patterned lead of a flexible lead-patterned substrate by a heating tool. The inner lead is coated on bottom and side surfaces of its tip portion. The bottom surface faces the patterned lead.
摘要:
An outer lead of a metal lead frame is connected to an inner lead of a flexible lead-patterned substrate via a Au--Sn alloy layer. The Au--Sn alloy layer contains Au of 10 to 40 weight %. An inner lead of a metal lead frame is connected to a patterned lead of a flexible lead-patterned substrate by a heating tool. The inner lead is coated on bottom and side surfaces of its tip portion. The bottom surface faces the patterned lead.
摘要:
A multi-metal layer wiring TAB tape carrier capable of forming a fine pattern without affecting the thicknesses of conductive metal layers, and a process for fabricating the multi-metal layer wiring TAB tape carrier. This TAB tape carrier is constructed such that respective dielectric film layers are interposed between adjacent ones of plurality of conductive metal layers having a predetermined wiring pattern, such that the dielectric film layer is formed with interfacial connection holes, and such that a conductive via layer is formed in the interfacial connection holes to electrically connect adjacent conductive metal layers. The conductive via layer is formed by a vapor deposition method such as evaporation, ion plating or sputtering. Alternatively, a portion of the conductive metal layers and the conductive via layer are simultaneously formed. Especially according to the latter method of forming a portion of the conductive metal layers and the conductive via layer simultaneously, the conductive via layer need not be formed after the conductive metal layers so that the fabrication steps are simplified. Moreover, the thicknesses of the conductive metal layers are not adversely affected later, and the conductive metal layers and the conductive via layer can be positioned highly precisely to form a fine wiring pattern.
摘要:
A high pin count and multi-layer lead frame according to the present invention which has a short pitch, high density lead pattern and at the same time, enhanced transmission characteristics for high-frequency signals includes at least one pair of conductive layers for grounding, power supply or both of them and one pair of insulating layers formed on these conductive layers, inner leads formed on the insulating layer on the top conductive layer by etching or vapor deposition in a short pitch, high density pattern, and outer leads made of metal frame. The inner leads are electrically connected to the leads for signals of the outer leads, the leads for grounding and power supply of the outer leads are connected to each of the conductive layers separately, and a plurality of holes for wire bonding the electrodes of a semiconductor element to each of the conductive layers are formed on each of the insulating layers.
摘要:
An epoxy resin composition which comprises an epoxy resin derived from an ester of an alkadienealcohol; an epoxy resin prepared by reacting an epichlorohydrin and a bisphenol and an acid anhydride curing agent. The cured product has very high mechanical strength and cracking resistance and is useful as an electrical insulating material.
摘要:
A weaving method and reed where the method is practiced with the reed having spacings between dents of 1/f fluctuations resulting in a woven fabric which has a warp density of 1/f fluctuations. The spacings are established by winding yarn having a 1/f fluctuation around the dent support bars with the dents positioned between the coils of wrapped yarn.
摘要:
A home hair-setter whose body is a cylindrical heat-resistant elastic member and wherein the outer peripheral surface of the body of the hair-setter is used to curl hair; the hair-curling section of the body is enclosed in a cylindrical envelope; and the body of the hair-setter has at least one of its both ends left open.
摘要:
An acid chloride can be produced at a high yield from a primary alcohol having a polyfluoroalkyl group and one methylene group by (1) a method in which RfCH2OH (wherein Rf is a polyfluoroalkyl group) is reacted with chlorine to produce RfCOCl, (2) a method in which RfCHO is reacted with chlorine to produce RfCOCl, and (3) a method for producing an acid chloride comprising (a) a step in which an aldehyde (RfCHO) is formed from an alcohol (RfCH2OH), (b) a step in which a monochloroester (RfCOOCHClRf) is formed from the aldehyde and an acid chloride (RfCOCl), and (c) a step in which the acid chloride (RfCOCl) is formed from the monochloroester.
摘要:
A weaving method for woven goods in which the warp yarns are disposed among reed dents of uniform spacing in a reed according to a sequence of numerical values having a 1/f fluctuation, thereby imparting a 1/f fluctuation to the arrangement of warp yarns.
摘要:
Continuous fluorination of carbon is carried out by employing an apparatus for contact reaction of solid powder and reactive gas which comprises a horizontal reactor having a trough provided with weirs (e.g. height: 1 to 6 mm., interval: 5 to 30 cm.) and a vibrating means for vibrating the trough, and in which carbon particles supplied continuously are transported on the trough in a form of thin layer by the vibration of the trough while continuing the reaction by contacting efficiently the carbon particles with a fluorine gas. The contact reaction is efficiently conducted without accumulating the reaction heat to produce the fluorinated carbon in high yields, and the process is useful for the mass production. The apparatus is also useful for various contact reaction of a solid powder and a reactive gas.