摘要:
A printed circuit board has a layer including a resin material, which has a tensile breaking strain of approximately 1% or more at a tensile strain rate of 40%/sec at 25° C., and an Izod impact strength of approximately 1 kgf·cm/cm or more at 25° C. Otherwise, the resin material has a peak value of dynamic loss tangent of 0.05 or more in a range of −100° C. to −50° C. by &bgr; relaxation, and a peak value of dynamic loss tangent of 0.02 or more in a range of 0° C. to 100° C. by &bgr;′ relaxation in a dynamic viscoelasticity spectral measurement. Accordingly, thermal shock resistance and drop shock resistance of the printed circuit board can be improved.
摘要翻译:印刷电路板具有包括树脂材料的层,其在25℃的拉伸应变速率为40%/秒,拉伸断裂应变为约1%以上,艾佐德冲击强度为约1kgf。 cm 2以上,另外,通过β弛豫,树脂材料在-100℃〜-50℃的范围内具有0.05以上的动态损耗角正切峰值,峰值 在动态粘弹性光谱测量中通过β'松弛在0℃至100℃的范围内的0.02或更大的动态损耗角正切。 因此,可以提高印刷电路板的耐热冲击性和耐跌落冲击性。
摘要:
An electronic component unit includes an interposer with a plurality of holes and a circuit wiring layer disposed on one surface of the interposer. The electronic component is electrically connected to the circuit wiring layer. A plurality of solder bumps are electrically connected to one surface of the circuit wiring layer through the holes formed in the interposer. The circuit wiring layer is electrically connected to an outside circuit through the solder bumps. A junction interface between the circuit wiring layer and each of the solder bumps is made of ductile metal.
摘要:
An aqueous liquid composition for treating the surface of copper-containing metals is a dispersion and/or solution in water and organic solvent, at least one silane coupling agent having a functional moiety selected from vinyl, mercapto, amino and glycidyloxy moieties bonded to one carbon atom in the silane coupling agent and other epoxy moieties bonded to two adjacent carbon atoms in the silane coupling agent and at least one copper inhibitor compound selected from azoles, azines, aromatic secondary amines, and aromatic diacylhydrazides. Treatment with this composition provides excellent migration resistance, an excellent solder resistance, and a very durable adhesiveness to a variety of copper containing metal surfaces.
摘要:
A chromium-free aqueous liquid surface treatment agent that can impart both a good corrosion resistance and a good paint adherence to zinciferous-plated steel sheet contains as its essential components polyhydroxyaryl carboxylic acid and/or depside thereof and silane coupling agent with the formula (YR).sub.m R.sub.n SiX.sub.(4-m-n), in which R denotes alkyl groups; X is the methoxy or ethoxy group; Y is the vinyl, amino, mercapto, glycidoxy, or methacryloxy group; m=1 to 3; and n=0 to (3-m). The total content of said essential components is preferably 1 to 50 weight %.
摘要翻译:PCT No.PCT / US95 / 00977 Sec。 371日期:1996年8月2日 102(e)日期1996年8月2日PCT提交1995年2月1日PCT公布。 出版物WO95 / 21277 日期1995年8月10日可赋予镀锌钢板良好的耐腐蚀性和良好的涂料粘附性的无铬水性液体表面处理剂作为其主要组分含有多羟基芳基羧酸和/或其后者和硅烷偶联剂 式(YR)m R n SiX(4-mn),其中R表示烷基; X是甲氧基或乙氧基; Y是乙烯基,氨基,巯基,缩水甘油氧基或甲基丙烯酰氧基; m = 1〜3; 和n = 0至(3-m)。 所述必需成分的总含量优选为1〜50重量%。
摘要:
A pattern (6B) is formed by performing selective exposure and development on a photosensitive resist (6A), and then the pattern (6B) is decolorized by irradiating the pattern with ultraviolet or visible light. Then, a microlens (6) is formed by deforming the shape of the pattern (6B) into a microlens shape by heating. An inequality of h/a≧1 is satisfied, where, (h) is the height of the microlens (6), and (2a) is the length of the bottom plane of the microlens (6) in a short side direction when viewed from the upper plane.
摘要翻译:通过对光敏抗蚀剂(6A)进行选择性曝光和显影来形成图案(6B),然后通过用紫外线或可见光照射图案来使图案(6B)脱色。 然后,通过加热将图案(6B)的形状变形为微透镜形状来形成微透镜(6)。 满足h / a> = 1的不等式,其中,(h)是微透镜(6)的高度,(2a)是微透镜(6)在短边方向上的底面的长度, 从上层飞机观察。
摘要:
A multilayer printed circuit board with a built-in capacitor includes a plurality of resin films, each of which is made of thermoplastic resin and has a plurality of via-holes at predetermined positions, a plurality of conductive patterns, which are located on the resin films, and a plurality of conductive pattern interconnecting members, which are located in the via-holes to electrically interconnect the conductive patterns that are electrically separated by the resin films. Two of the conductive patterns are respectively located on two surfaces, which are opposite to each other, of one of the resin films while overlapping. The two of the conductive patterns and the one of the resin films make up a capacitor.
摘要:
In an electronic-component mounting structure, an electronic component (2) has a surface. First electrodes (1) provided on the surface of the electronic component (2) are arranged in a first array. Second electrodes (3) provided on a base board (4) are arranged in a second array corresponding to the first array. The second electrodes (3) correspond to the first electrodes (1) respectively. Solder bumps (9) connect the first electrodes (1) and the second electrodes (3) respectively. The first electrodes (1) include first outermost electrodes (1b) located in an outer area of the first array. The second electrodes (3) include second outermost electrodes (3b, 3c) located in an outer area of the second array. The second outermost electrodes (3b, 3c) correspond to the first outermost electrodes (1b) respectively. An outer edge (X1, Z1) of each of the second outermost electrodes (3b, 3c) extends outward of an outer edge (Y1) of a corresponding first outermost electrode (1b) with respect to the first and second arrays. A distance between an outer edge (X1, Z1) of each of the second outermost electrodes (3b, 3c) and an outer edge (Y1) of a corresponding first outermost electrode (1b) is greater than a distance between an inner edge (X2, Z2) of the second outermost electrode (3b, 3c) and an inner edge (Y2) of the corresponding first outermost electrode (1b) with respect to the first and second arrays.
摘要:
A BGA package is mounted on a multi-layer printed wiring board having a plurality of electrodes arranged in a matrix form through a plurality of solder bumps. In the most externally-located electrodes, a lead wire is formed to extend from a portion of the most-externally-located electrode located inside of a polygon formed by connecting each of the centers of adjacent most-externally-located electrodes. Therefore, the solder bumps are prevented from coming off the most-externally-located electrodes because a portion of the most-externally-located electrode to which stress caused by an external shock is intensively applied is located in an outside of the polygon. Thus, a contact failure between the BGA package and the multi-layer printed wiring board is prevented.