Is antenna diode permanently damaged after the first time use?

[Naziur Rahman]

Hi there,
We use the antenna diode in reverse bias. What happens to the diode after it let pass the accumulated charge through it?
Is it permanently damaged? If so does it have any effect?

 

[danadakk]

If you breakdown diode in reverse condition, not current limited,
and its a small signal diode my guess is yes. What is type/part
number of diode ?

Regards, Dana.

 

[Naziur Rahman]

If you breakdown diode in reverse condition, not current limited,
and its a small signal diode my guess is yes. What is type/part
number of diode ?

Regards, Dana.

I did not understand what do you meant by type/part number.

 

[dick_freebird]

No, if you mean "use" in its intended in-line discharging
role. That role works because the same steps which
charge the metal during etch, throws enough UV and soft
X-rays that the diodes become photoconductive. They
do not need to be broken down (and in fact would fail
to protect a 0.8V gate ox altogether, if you have 6-7V
BV on the N+ / Pepi junctions which is the norm).

There should be PDK guidance on allowed reverse voltage.
That should be at least as high as the NFETs which use
that same junction (look to long channel I/O devices, as
lacking or minimizing some of the short-channel, thin-
oxide, spacer oxide hot carrier reliability detractors).