Wesley,
        
                Mil-Std. 2000 (A) only specifies the minimum .008" solder
connection height if the component has bottom only terminations.  Most LCC's
have bottom and side castelation/termination which eliminates the
requirement for the .008 spacing.  See 4.23.5 of Mil-STD 2000A for
clarification.  I see no reference to specific spacing requirements in the
actual Mil-Std 2000 (16, January 1989).

                                        Mark Spitnale

                                        Hughes Defense
                                        (219) 429-5992        

At 07:06 AM 2/7/97 -0500, you wrote:
>>Return-Path: <[log in to unmask]>
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>>From: [log in to unmask]
>>To: [log in to unmask]
>>Date: Wed, 5 Feb 1997 10:20:51 +0000
>>Subject: Assy:LCC height control
>>Priority: normal
>>Resent-Message-Id: <"-c4eJ2.0.zo7.FUD-o"@ipc>
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>>Hello
>>
>>Does anyone have experience trying to control the height of an LCC 
>>(leadless) off the board.  I have drawing requirements of .008".
>>The components are ceramic and are on both sides of the board.
>>The board is mixed technology and extremely dense.  It also has a 
>>.062" heatsink (plate) on the top side. Top side printing is out of 
>>the question.
>>
>>The volumes are low (about 80)
>>LCC component count is about 30 per board
>>The design is fixed (no chance in He** of changing
>>Spec 's are Military ie..2000
>>
>>I have tried to locate water/solvent soluable waffers with no luck (.008")
>>Hand soldering with a spacer is not my preffered option either
>>
>>Any recomendations would be appriciated
>>
>>Thanks in advance
>>
>>Wesley Samples
>>[log in to unmask]
>>(817)  234-6842
>>
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>----------------------------------
>Jeffery 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]
>
>"Those who dream by day are cognizant of many things which escape those who
>dream only by night"    - -Edgar Allen Poe
>
>
>
----------------------------------
Mark W. Spitnale                Phone: (219) 429-5992   Fax: (219) 429-
Hughes Defense Communications                           Mail Stop: 25-31
1010 Production Road, Fort Wayne, IN 46808-4106
Email: [log in to unmask]

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