The recording medium cartridge of the invention can keep superiority in supplying a power source and realize a high capacity of an IC chip and an improvement of communications performance, with a cartridge memory being able to be flexibly arranged in a cartridge case. The cartridge has a cartridge memory and the memory is separately composed so that the IC chip is electrically connected with an antenna

 
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< Method of fabricating a narrow projection such as a write pole extending from a substrate

> Head suspension assembly with femto-slider and disk device provided with the same

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