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What mean "glass passivated" Devices ?

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jinboqiu

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Hi,
I don't know the technical terms "glass passivated device" ,that often appear in some discrete devices data sheet ? Anyone can tell me the means will be highly appreciated!
Thanks!
 

mitaka

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cite
"The glass passivation gives increased durability and improved reliability at high operating temperatures with better moisture resistance."
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VSWR

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Glass passivation is applied for many kinds of Si semiconductor components. In manufacture and application semiconductor surfaces are protected against mechanical and chemical attacks by melted-on glass layers.

See e.g.
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