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June 1997

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Subject:
From:
[log in to unmask] (Aric J Parr)
Date:
Fri, 6 Jun 1997 10:14:06 -0500
Content-Type:
text/plain
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The parts are already on the bottom side of the PCB

I am trying to design the stencil. There are other parts on the top side that 
will be reflowed along with this part.__ _
                        ----------\       \
                _________________  | solder\    __________
                    PC Board    |  | Part  |    |PC Board
                ________________|  |_______|    |_________
                        -----------------------------------
                                Metal Plate

______________________________ Reply Separator _________________________________
Subject: Re: double sided reflow-soldering top side to bottom side
	
Author:  "Jeffery L. Hempton" <[log in to unmask]> at INTERNET
Date:    6/6/97 9:51 AM


Aric,
  I am trying to visualize what you are describing, and I come up a little
short. Could you be more specific, i.e., are there already parts on the top 
or bottom side?? Sounds like you already have a stencil fabbed? I think we 
can give you some creative ideas to help your problem if you clarify. Thanx.
     
     
At 08:52 AM 6/6/97 -0500, you wrote: 
>     
>     I have an application where I need to reflow solder a part on the top 
>     side of a double sided SMD board through the board to a bottom side 
>     component without plating the hole. 
>     
>     This part is large and is placed within a slot in the panel. It must 
>     physically touch the part on the bottom side.
>     
>     Does anyone have any suggestions on screen printing this, 
>     
>     The stencil aperture will not contact the PCB surface where I need to 
>     put the paste, but will be over a slot in the PCB.
>     
>     
>     Thanks for any help,
>     
>     
>     
>     Aric
>     
>
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----------------------------------
Jeff L. Hempton        phone: (219) 429-7335   Fax: (219) 429-4688 
Boardshop Manufacturing Engineer                        Mail Stop: 25-31 
Hughes Defense Communications                           
1010 Production Road, Fort Wayne, IN 46808-4106 
Email: [log in to unmask]
     
"The man who rolls up his sleeves seldom loses his shirt."--Thomas Cowan
     
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