The advantage of applying the utility model is that people does not need to redesign an etched circuit card in order to match an integrated circuit of another packing type.

应用本实用新型，可以不必因为匹配另一种封装类型的集成电路而重新设计印刷电路板。

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Ring-Mounting machine is mainly used for mounting the reference-positioning ring to the tool and removing the ring from it on numerical controlled drill, fraise machine for etched circuit card.

装圈机主要用于印制电路板数控钻床，铣床加工刀具装上，卸下基准定位环只用。

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RD auto pinning machine is used to make reference positioning pin prior to drill the laminated plates of etched circuit ca rd on drill machine for etched circuit ca rd manufacture premium products.

rd 全自动钉销机用于印刷电路叠层板在印制电路板数控钻床钻孔前钻作基准定位销钉，从面保证印刷电路板数控钻床能加工出高品质的产品。

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Glasslike silicon dioxide has been the insulator of choice in electronic chips since 1959, when Bob Noyce cobbled together the first silicon integrated circuit--wires and switches etched into silicon insulation.

FORBES: Magazine Article

In particular, the processes by which the circuit pattern is first projected on to a chip's surface lithographically, and then etched on to it chemically, will need to be altered to take account of the fact that the surface is curved.

ECONOMIST: Semiconductors