What mean "glass passivated" Devices ?

[jinboqiu]

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]

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

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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