Groups > sci.electronics.design > #519120

Re: guard ring?

From	"Tim Williams" <tiwill@seventransistorlabs.com>
Newsgroups	sci.electronics.design
Subject	Re: guard ring?
Date	2018-10-12 21:16 -0500
Organization	A noiseless patient Spider
Message-ID	<pprker$6d5$1@dont-email.me> (permalink)
References	<t422sdt4ht4vg7m40fqvvgfn20i6pala5r@4ax.com> <ppr5sh$3mq$1@dont-email.me> <b782sdhv8gtok4b8br9pjpik68m6rf15qt@4ax.com> <ppre16$cpu$1@dont-email.me>

Show all headers | View raw

> "John Larkin" <jjlarkin@highland_snip_technology.com> wrote in message 
> news:b782sdhv8gtok4b8br9pjpik68m6rf15qt@4ax.com...
>>>Heat gun/ + heat pad under...
>>
>> I don't want to melt everything else, and there's stuff on the back
>> side of the board, too. My manufacturing people could do it for me,
>> but they're busy. I applied my biggest Metcal tip and waited about 5
>> minutes for the big diode to finally let loose. I suspect that the
>> solder didn't fully flow under the new tiny diode, but it runs cool.
>

Hot air machines are super cheap, and don't melt anything but what they're 
pointed at.  Assuming the only thing melting is solder.  You probably 
shouldn't have melty things like electrolytics and film caps nearby on an 
SMT board, anyway, but a heat shield (aluminum foil) keeps that feasible.

Tim

-- 
Seven Transistor Labs, LLC
Electrical Engineering Consultation and Design
Website: https://www.seventransistorlabs.com/

Thread

guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-12 14:01 -0700
  Re: guard ring? TTman <kraken.sankey@gmail.com> - 2018-10-12 23:06 +0100
    Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-12 15:38 -0700
      Re: guard ring? "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-10-12 19:26 -0500
        Re: guard ring? "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-10-12 21:16 -0500
          Re: guard ring? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-13 09:11 +0000
            Re: guard ring? "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-10-13 04:51 -0500
              Re: guard ring? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-13 09:58 +0000
      Re: guard ring? George Herold <gherold@teachspin.com> - 2018-10-12 18:12 -0700
    Re: guard ring? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-13 00:02 +0000
  Re: guard ring? <698839253X6D445TD@nospam.org> - 2018-10-13 06:59 +0000
  Re: guard ring? Robert Baer <robertbaer@localnet.com> - 2018-10-13 22:45 -0700
    Re: guard ring? John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-14 09:44 -0700
      Re: guard ring? John S <Sophi.2@invalid.org> - 2018-10-14 12:45 -0500
        Re: guard ring? krw@notreal.com - 2018-10-14 14:28 -0400
      Re: guard ring? Jasen Betts <jasen@xnet.co.nz> - 2018-10-14 19:28 +0000
        Re: guard ring? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-14 20:57 +0000
          Re: guard ring? Jasen Betts <jasen@xnet.co.nz> - 2018-10-15 05:20 +0000
            Re: guard ring? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-15 10:59 +0000
      Re: guard ring? "nuny@bid.nes" <alien8752@gmail.com> - 2018-10-14 17:39 -0700
  Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-14 14:56 -0700
    Re: guard ring? <698839253X6D445TD@nospam.org> - 2018-10-15 07:23 +0000
    Re: guard ring? <698839253X6D445TD@nospam.org> - 2018-10-15 07:54 +0000
      Re: guard ring? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-15 11:21 +0000
        Re: guard ring? John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-15 07:52 -0700
  Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-16 10:31 -0700
    Re: guard ring? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-16 14:23 -0400
    Re: guard ring? "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-10-16 17:09 -0500
      Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-16 16:02 -0700
        Re: guard ring? "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-10-17 03:57 -0500
          Re: guard ring? John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-17 04:52 -0700
      Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-17 11:00 -0700
        Re: guard ring? Steve Wilson <9fe142ac@gmail.com> - 2018-10-17 12:13 -0700
        Re: guard ring? Steve Wilson <9fe142ac@gmail.com> - 2018-10-17 12:19 -0700
          Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-17 12:39 -0700
        Re: guard ring? Jasen Betts <jasen@xnet.co.nz> - 2018-10-17 19:15 +0000
        Re: guard ring? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-17 15:33 -0400
          Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-17 12:56 -0700
            Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-17 13:15 -0700
        Re: guard ring? "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-10-17 16:34 -0500

csiph-web