Electronics Forum | Fri Dec 17 16:07:07 EST 1999 | Alex B
Hi, C.K. Let's assume that your stencil's thickness is in a range 4-6 mil or by other words the height of the solder paste on a pads is the same (close enough to reality) Therefore, for pad's width more than 20 mils(as well as pitch between pads) th
Electronics Forum | Fri Dec 03 03:58:12 EST 1999 | Wolfgang Busko
Hi Charly, For batch ovens there is no discussion. For inline loading interval depends on the oven you use, the amount of heat the PCB takes out of the zone and the capability of the oven to get it back in. The approximate time for the PCB to stay i
Electronics Forum | Thu Nov 18 00:28:02 EST 1999 | Scott McKee
Use Mydata. I've built huge backplane boards, round boards, 1/4" thick boards, 1"X24" boards, 1"X1" boards, L-shapes boards; all without any carriers or tooling. If you buy a MY15 you can increase the board size to 5'X2' (60"X24")... As for ovens,
Electronics Forum | Wed Dec 01 01:15:44 EST 1999 | Jeff Skeith
dave, you are right on. a blow torch isn't needed to light a fire. a small coplanar aluminum block works extremely well. my dept fixes thousands of fine pitch parts to to less than 4 mils from low lead to high lead every month. all we use is a sm
Electronics Forum | Thu Sep 23 22:31:25 EDT 1999 | Dave F
| | i'm sure everyone has run into this at one point or another. I have a thin pcb .025 that is single up that has to be built on a pallet. does anyone have any tricks to the pallet design that will help to hold these boards down during the scree
Electronics Forum | Wed Sep 15 10:55:21 EDT 1999 | Scott S. Snider
| Hi, | | Can someone pls suggest to me the best reflow temperature setting | for a force air convection oven. The details is as follow. | 1) Heller 1700s | 2) 12 zone---6 top and 6 bot | 3) Solder paste --- Qualitek 691 non clean | 4) board size :
Electronics Forum | Tue Sep 14 18:19:53 EDT 1999 | Mark Deren
| | Is it possible to place 0402 components with a Fuji CP2? How about a CP4? What are the suggestions for 0402 machine placement? | | | | Any help would be appreciated. According to the latest Fuji America S.M.T. Report I have, 0402 (1005) compo
Electronics Forum | Mon Sep 13 12:31:41 EDT 1999 | Wolfgang Busko
| Hi, | | Recently encountered missing components problem at the SMT process. | Among 13 chip components from the same part number mounted on the board, only 4 ( located in a same row and next to each other) were missing after post reflow. Checked t
Electronics Forum | Sat Sep 04 06:37:46 EDT 1999 | JC Leigh
Dear all, I don't know if I'm asking at the right place here, since you all seem to be more focused on process problems then programming problems (or perhaps programming isn't a problem for you). I'm using FUJI CP642's and I've got some components
Electronics Forum | Tue Aug 31 12:42:45 EDT 1999 | Charles Barker
****************************************** ***************** HELP! *************** ****************************************** We are having a special ceramic smt board made. The boards are 16-up arrays that have smt pads on both sides. Only thre
