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    • 8. 发明授权
    • Circuitized structures produced by the methods of electroless plating
    • 通过无电镀方法生产的电路结构
    • US06680440B1
    • 2004-01-20
    • US09027856
    • 1998-02-23
    • David John RussellGerald Walter JonesHeike MarcelloVoya Rista Markovich
    • David John RussellGerald Walter JonesHeike MarcelloVoya Rista Markovich
    • H05K116
    • H05K3/287G03F7/0385H05K3/0023H05K3/184H05K3/243H05K2203/072
    • The present invention provides new methods for electroless plating of metal particularly gold and copper onto substrates, such as circuitized substrates, which reduces processing steps, reduces metal consumption, and reduces the scraping of parts due to contamination. The method employs a permanent plating resist. The method for electrolessly plating metal onto a substrate, including the following steps: providing: an uncured, photoimagable, dielectric permanent plating resist comprising: from about 10 to 80% of phenoxy polyol resin which is the condensation product of epichlorohydrin and bisphenol A, having a molecular weight of from about 40,000 to 130,000; from about 20 to 90% of an epoxidized multifunctional bisphenol A formaldehyde novolac resin having a molecular weight of from about 4,000 to 10,000; from 0 to 50% of a diglycidyl ether of bisphenol A having a molecular weight of from about 600 to 2,500; and from about 0.1 to 15 parts by weight of the total resin weight, a cationic photoinitiator; applying the permanent plating resist on the substrate; photopatterning the permanent plating resist to form apertures therein which expose areas of the substrate; and electrolessly plating metal onto the exposed areas of the substrate. The permanent plating resist is useful to protect the substrate areas including for example metallized features on the substrate, from the electroless deposition of metal during electroless plating; thus selective plating of metal is achieved. The permanent plating resist is not degraded by conventional gold or copper electroless baths. The invention also relates to circuitized structures produced by the methods of electroless plating.
    • 本发明提供了金属特别是金和铜在电路化基板等基板上进行化学镀的新方法,其减少了加工步骤,降低了金属消耗,并减少了由于污染引起的部件刮擦。 该方法采用永久电镀抗蚀剂。 将金属无电镀在基板上的方法,包括以下步骤:提供:未固化的,可光成像的绝缘永久电镀抗蚀剂,其包含:约10至80%的作为表氯醇和双酚A的缩合产物的苯氧基多元醇树脂,其具有 分子量为约40,000至130,000; 约20至90%的分子量为约4,000至10,000的环氧化多官能双酚A甲醛酚醛清漆树脂; 0至50%的分子量为约600至2,500的双酚A的二缩水甘油醚; 和约0.1至15重量份的总树脂重量,阳离子光引发剂; 在基板上施加永久电镀抗蚀剂; 对永久电镀抗蚀剂进行光图案化以在其中形成露出基板的区域的孔; 并将金属化学镀在衬底的暴露区域上。 永久电镀抗蚀剂可用于保护衬底区域,包括例如基板上的金属化特征,在化学镀期间的金属化学沉积; 从而实现了金属的选择性镀覆。 永久电镀抗蚀剂不会被常规的金或铜无电镀浴降解。 本发明还涉及通过化学镀方法制造的电路结构。