--0__=cozh5Cfu7iJmEDbr1ZZ2DUk6zOfttVVhNwU8CCFFA69XcCve0h35sWXd Content-type: text/plain; charset=us-ascii Content-Disposition: inline Sorry... hot air pencil looks like a little soldering iron, but it blow a gentle stream of hot air. Solder paste is like solder, but it is the consistency of... of....of.... well it can flow, but is very stiff. You can dispense it from a syringe like thing with a decent size nozzle. You put some paste on each pad where the part will be, lay the part on the paste, and use the hot air pencil to reflow the paste (melt it.. like how solder melts). |--------+--------------------------> | | Simon Ethier | | | | | | | | | 02/28/01 02:11 | | | PM | | | Please respond | | | to pic | | | microcontroller | | | discussion list | | | | |--------+--------------------------> >----------------------------------------------------------------------------| | | | To: PICLIST@MITVMA.MIT.EDU | | cc: (bcc: Scott Touchton/US/UNIPHASE) | | Subject: Re: [ot]: surface mount question... | >----------------------------------------------------------------------------| What exactly is a hot air pencil and paste ? How does it works ? thanks ----- Original Message ----- From: "Scott F. Touchton" To: Sent: Wednesday, February 28, 2001 2:01 PM Subject: Re: [ot]: surface mount question... > Yes > > With a steady hand and a good eye it is easy. Hot air pencil and paste is > easier than fine point iron, but iron is OK. Just hold with tweezers and tack > each end down. > > 1206 package are good to start with... 0805 not too bad 0604 challenging and > I've only had a few tech's that can hand build 0402 (all numbers are package > sizes). The real tiny RF stuff is usually done under 10X or greater > magnification. > > Advantage is size (small and less parasitics) and reduced board costs (size and > limited drilling). > > > |--------+-----------------------> > | | rad0 | > | | | | PRING.COM> | > | | | > | | 02/28/01 | > | | 01:43 PM | > | | Please | > | | respond to | > | | pic | > | | microcontroll| > | | er discussion| > | | list | > | | | > |--------+-----------------------> > >--------------------------------------------------------------------------- -| > | | > | To: PICLIST@MITVMA.MIT.EDU | > | cc: (bcc: Scott Touchton/US/UNIPHASE) | > | Subject: [ot]: surface mount question... | > >--------------------------------------------------------------------------- -| > > > > > > Can you use a surface mount chip one at a time? > > Or must these things be 'installed' using a machine? > > I'm thinking of myself as a hobbiest, building a prototype. > > I just want to know if this can be done on a work bench > > > I'm assuming the surface mount stuff is much smaller and > more compact, this is their advantage right? > > Thanks > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. > > > -- http://www.piclist.com hint: The PICList is archived three different ways. 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