Magnetic disk drive and soldering method of feed-through

A technology for disk drives and magnetic disks, used in instruments, poor vibration/sound insulation/absorption, sealing gaskets, etc., can solve problems such as poor sealing ability, large diffusion coefficient, and small helium gas, and achieve improved leakage service life, reliable Solder bonding, the effect of preventing deterioration
CN101290791AInactive Publication Date: 2008-10-22HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
Publication Date
2008-10-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a solder connecting structure with high reliability, characterized in that, even if the flange of lead wire of sealed disk driver is made of kovar that is an iron-based material, the low density gas may almost not leak out; and a base of the driver is made of aluminium-based alloy. The base 10 has a step-shaped portion 22 located inside the periphery of an opening 20; a bevel 26 extending out of the base 10 is formed at the edge of a surface 24 of the step-shaped portion; a flange 32 of the lead wire 30 is placed on the bevel 26; therefore, a round corner of the solder 42 is not only formed inside of the base 10, but also formed outside of the same, when the step-shaped portion 22 of base is connected with the flange 32 of lead wire by welding.
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Description

technical field

[0001] The present invention relates to disk drives, and more particularly, to hermetically sealed disk drives adapted to seal a low density gas, such as helium, inside the drive. Background technique

[0002] In recent magnetic disk drives, a magnetic disk is rotated at a high speed and a head suspension assembly is driven at a high speed in order to satisfy demands for large capacity and high recording density. Therefore, there is a high possibility that air turbulence (wind turbulence) causes vibration of the magnetic disk or the head suspension assembly. Wind turbulent vibrations can significantly hinder the positioning of the magnetic head on the track of a magnetic disk undergoing high-density recording. The reason is that since wind turbulence is caused by air turbulence, which occurs randomly, the magnitude or period of wind turbulence is almost impossible to predict, and therefore when trying to control the positioning of the head quickly and accura...

Claims

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