Hi Ramon!
The J-STD only allows gold on PTH components if it is
below a certain thickness. But it states that you must remove
95% of the gold from the solderable surfaces regardless of
the thickness.
I'm trying to track down somebody that I can speak with who
made these devices, to learn what the solder alloy is that connects
the top half of the part...it's probably high temp solder.
I don't want to take a chance with these little guys by experimenting,
because they are customer supplied material. The reason they are
customer supplied is because they did a lifetime buy of them...once
they're gone, they're gone...there is no replacing them.
Kind regards,
-Steve Gregory-
Senior Process Engineer
LaBarge Incorporated
Tulsa, Oklahoma
(918) 459-2285
(918) 459-2350 FAX
|---------+---------------------------->
| | "Dehoyos, Ramon" |
| | <ramon.dehoyos@ng|
| | c.com> |
| | |
| | 04/13/2005 02:21 |
| | PM |
| | |
|---------+---------------------------->
>--------------------------------------------------------------------------------------------------------------|
| |
| To: "TechNet E-Mail Forum" <[log in to unmask]>, <[log in to unmask]> |
| cc: |
| Subject: RE: [TN] Tinning of Bipolar Transistor |
>--------------------------------------------------------------------------------------------------------------|
Hi Steve:
It should be no problem. The package
is made of what appears ceramic. I would still do one and check it under
the microscope just in case. I talked a while back to a lead plating
company and they let me know, that the plating thickness, that gold
flashing (that is the gold plating process used on leads) produces, is less
than the 98 millionths of an inch that is allowable by J-STD-001. In many
cases it is not even necessary to remove the gold. Many people do it just
in case.
Regards,
Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Stephen Gregory
Sent: Wednesday, April 13, 2005 1:50 PM
To: [log in to unmask]
Subject: [TN] Tinning of Bipolar Transistor
Hi All!
We've got this Bipolar Microwave Transistor that I've just seen for
the first time, and I was asked if this part needs tinning because of
the gold plating.
I know what the J-STD says, but looking at the construction of the part,
I don't know if the part can withstand the heat of a tinning operation.
Take a look at "Bipolar Transistor" on my web page at:
http://www.stevezeva.homestead.com
I've tried to track down a datasheet, but can't seem to find one. The top
of the part is marked; "TRW 54601" and just below that, there's a "C86"
marked there.
The part may be very robust, and I have nothing to worry about. But
because this is the first time I've seen something like this, I thought I'd
ask the experts out there...
Kind regards,
-Steve Gregory-
Senior Process Engineer
LaBarge Incorporated
Tulsa, Oklahoma
(918) 459-2285
(918) 459-2350 FAX
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