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May 2003

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Subject:
From:
"Dehoyos, Ramon" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 19 May 2003 09:44:45 -0700
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        For the explanation of levels A, B and C see IPC 2221  paragraph
1.6.3
        Regards,
        Ramon

> -----Original Message-----
> From: Dehoyos, Ramon
> Sent: Monday, May 19, 2003 8:30 AM
> To:   [log in to unmask]
> Subject:      Re: [TN] Lead:Hole Ratio and Annular Ring Size
>
>         Al:
>         Check IPC 2222  paragraph 9.2.2 and Table 9-3
>         Regards,
>         Ramon
>
> > -----Original Message-----
> > From: [log in to unmask] [SMTP:[log in to unmask]]
> > Sent: Friday, May 16, 2003 10:50 AM
> > To:   [log in to unmask]
> > Subject:      [TN] Lead:Hole Ratio and Annular Ring Size
> >
> > Hello Technetters,
> >
> > I'm looking for industry specs (or just other technetters experience) on
> > lead:hole ratio and annular ring (pad) size when using pth dc converters
> > (Lucent, Tyco, Ericsson, etc.) that have lead diameters that are .040",
> > .062", .080, and/or .180".
> >
> > Does the standard .015"-.017" lead:hole ratio still apply to these large
> > leads?  And should the pad size increase linearly with the increase in
> > lead
> > diameter?
> >
> > Thanks in advance as always,
> >
> > See some of you at NEPCON East?
> >
> > Al Kreplick
> > Sr. Manufacturing Engineer
> > Teradyne, Inc.
> > 500 Riverpark Drive
> > Mail Stop NR500 1-1
> > North Reading, MA 01864
> > Tel:  978-370-1726
> > Fax:  734-661-5352
> > Pager:      888-561-6485
> >
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