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    • 5. 发明授权
    • Lead-free solder, and paste solder composition
    • 无铅焊料和焊膏组成
    • US06726780B2
    • 2004-04-27
    • US10384829
    • 2003-03-10
    • Takao OnoMitsuru IwabuchiKenji FujimoriHiroaki Koyahara
    • Takao OnoMitsuru IwabuchiKenji FujimoriHiroaki Koyahara
    • B23K3522
    • C22C13/00B23K35/025B23K35/262H05K3/3463H05K3/3484
    • There is provided a lead-free solder which makes it possible to reliably and accurately perform the inspection of various kinds of defective soldering in the inspection using an image inspection apparatus after the reflow soldering. According to this lead-free solder, the delustering of the metallic luster of fillet is realized in order to minimize the probability of generating a dark portion at the area where no defective soldering is existed and instead to increase the area of whitish portion which can be generated through the irregular reflection of beam. Specifically, this invention provides a lead-free solder comprising an Sn—Ag—Cu-based lead-free solder containing a small quantity of Bi and Sb as an element which is capable of generating a delustering component for minimizing metallic luster of the fillet.
    • 提供了一种无铅焊料,其使得可以在回流焊接之后使用图像检查装置可靠且准确地执行检查中的各种不良焊接。 根据这种无铅焊料,实现了圆角金属光泽的消光,以便在不存在有缺陷焊接的区域处产生暗部的可能性最小化,而是增加发白部分的面积 通过梁的不规则反射产生。 具体而言,本发明提供了一种无铅焊料,其包含含有少量Bi和Sb作为元素的Sn-Ag-Cu系无铅焊料,其能够产生用于使金属丝的金属光泽最小化的消光部件。
    • 10. 发明授权
    • Photosensitive resin composition and printed wiring board
    • 感光树脂组合物和印刷线路板
    • US06756166B2
    • 2004-06-29
    • US10252200
    • 2002-09-23
    • Takao OnoIchiro Miura
    • Takao OnoIchiro Miura
    • G03F7038
    • G03F7/038H05K3/287
    • Disclosed is a photosensitive resin composition which can be developed using a dilute aqueous alkaline solution after ultraviolet ray exposure, is excellent in pot life, capable of preventing deposits from being generated in a cured coated film, capable of widening heat control tolerance, and is excellent in sensitivity, in heat resistance, in chemical resistance and in electric insulating properties, thereby rendering the composition suitable for use as a solder resist for producing a printed wiring board. This photosensitive resin composition comprises (A) an active energy ray-curable resin having at least two ethylenic unsaturated linkages per molecule thereof, (B) at least one kind material selected from acid salts of N-substituted melamine compound and acid salts of guanamine compound, (C) a photopolymerization initiator, (D) a diluent, and (E) a thermosetting compound. There is also disclosed a printed wiring board where this photosensitive resin composition is employed.
    • 公开了一种感光性树脂组合物,其可以在紫外线照射后使用稀碱水溶液显影,具有优异的适用期,能够防止在固化涂膜中产生沉积物,能够扩大耐热耐受性,并且优异 敏感性,耐热性,耐化学性和电绝缘性,从而使组合物适合用作制造印刷线路板的阻焊剂。 该感光性树脂组合物包含(A)每分子具有至少2个烯键式不饱和键的活性能量射线固化性树脂,(B)选自N-取代三聚氰胺化合物的酸式盐和胍胺化合物的酸盐中的至少一种 ,(C)光聚合引发剂,(D)稀释剂和(E)热固化性化合物。 还公开了使用该感光性树脂组合物的印刷电路板。