Electronics Forum | Thu Nov 10 11:59:31 EST 2022 | dontfeedphils
Probably preform some sort of solderability evaluation on the PCBs.
Electronics Forum | Tue Aug 08 18:28:11 EDT 2000 | Shawn Mavity
I am looking for a supplier that I could by approximatly 7000 preformed solder rings from that will make it cost effective. We need to different sizes and so far the quotes that I have recieved are some what out of the price range to make it an optio
Electronics Forum | Tue Nov 30 11:51:58 EST 1999 | g cronin
i have a large job that has quite a few stand-up axial resistors on it and i am looking for a way to prep them does anyone know of: - a service that does this type of preforming, - a fairly inexpensive machine capable of stand-up preforming please
Electronics Forum | Mon Nov 09 07:57:58 EST 1998 | Mark Quealy
| Does anyone know of a company that reballs BGA's? Im looking for a reliable source that can do a 10/90 alloy. | Winslow Automation in Cal. sells re-balling services as well as a line of preforms and fixtures to do it yourself. We've been re-ball
Electronics Forum | Fri Aug 17 10:01:50 EDT 2001 | Hussman
Howdy All, Just want to know if solder pre-form really work. Any pit falls? Looking to solder a through hole connector (70 pin) in a 0.062" PCB with 10 zone convection reflow oven. My biggest worry is getting enough wetting on both sides of the b
Electronics Forum | Thu Jul 07 17:59:58 EDT 2005 | russ
I have found that if you place it "upside down" with the paper on the bottom they work very well also. The paper has a tendency to warp during heating which causes the no connects. by adding flux to the preform you are essentially sticking the pref
Electronics Forum | Thu Feb 23 19:55:30 EST 2006 | pjc
Not sure on stepped stencil designs, very application specific. Try consulting with your stencil supplier. Most of the big suppliers have applications engineering support. You can send them your board data and they can review and advise. Also, consid
Electronics Forum | Mon Apr 01 03:55:59 EDT 2019 | robl
Hi Lee, Depends on the pitch, but 3 main options: 1) Use solder preforms and intrusively reflow https://www.indium.com/solders/preforms/ 2) Use a selective solder machine on smallest nozzle or Robot with fine tip. Our Versaflow 3/45 can handle the
Electronics Forum | Wed Jan 20 20:01:27 EST 1999 | Tony Arteaga
| | Does anyone have information pertaining to re-balling BGA components using balls that are preformed onto disolable paper waffers (mini BGA reballing kit)? The paper containing the specific BGA device/pattern would be placed onto the BGA then pro
Electronics Forum | Fri Apr 17 14:08:44 EDT 1998 | Earl Moon
| Currently I am in the buisness of soldering bare die to the top surface of a copper heat sink. Is any one else | have some exprience in this process that can help. We heat a copper slug through a contolled atmosphere, place a preform then a bare