Electronics Forum | Thu Dec 30 23:25:49 EST 1999 | Henry C. Yao
We're using 96.5/3.5 high temp solder paste for our production and we're encountering soldering defects particularly non wetting (tombstoning). A technical document I read mentioned that there is a sort of a problem with the wettability of this paste
Electronics Forum | Tue Dec 28 12:34:03 EST 1999 | Justin Medernach
Jim, I wouldn't sweat a TCE mismatch between Ceramic chip components and FR4. No need to worry. 99.5% of consumer product out there utilizes this exact technology with no threat of failure due to CTE mismatch. The terminices of the components occu
Electronics Forum | Mon Jan 06 07:21:43 EST 2003 | Evtimov
Hi Mike,I thing the most important question is what's the series of your production? Is necessary to buy a huge line or you need middle or even low class machine? The costs are very different. If we're talking about 1-2 million cmps/month you can get
Electronics Forum | Mon Dec 20 07:09:03 EST 1999 | Christopher Lampron
Ron, The simplest way to process fexible PCB's that I have found is to use a process carrier fixture. There are companies that manufacture process carriers that are capable of holding flex through stencil, placement and reflow. The carriers are capab
Electronics Forum | Thu Dec 02 01:24:57 EST 1999 | CS Tan
Hi Dick; I don't know what business you are in. If you are doing your own products, then outsourcing can be a very good decision. But if you are doing OEM for someone else, then you must invest in SMT if you want to stay in business. But from my expe
Electronics Forum | Tue Nov 30 12:02:02 EST 1999 | Steve
Hello All, We assemble boards which are small in size. We use nests for support when screen printing the boards. The nest gives support along the edges of the board. However we are bringing in a new product which has components very close to one edg
Electronics Forum | Tue Dec 07 22:25:45 EST 1999 | sin
Dave, the zero-defect is impossible through my understand in a high volume or proto run manufacturing. Base on theory i have read, yes of course it should be. but practical side of view, it is impossible. you are talking about plenty of variable to
Electronics Forum | Sat Nov 27 10:16:38 EST 1999 | Steve Thomas
The new design resulted in much better release characteristics. We are quite satisfied. By the way, he says he can cut dead nuts 90 degree walls on the apertures, or traps. I didn't ask what the wall angle was, nor have I seen any recommendations,
Electronics Forum | Thu Nov 04 14:13:34 EST 1999 | John Thorup
Hi Tim It sort of depends on the solder alloy being used and the particular assemblies being soldered. If you are using the usual 63/37 alloy I would consider 500 to be a bit warm unless the assembly required it. Some alloys would require a higher
Electronics Forum | Thu Oct 28 12:02:13 EDT 1999 | John Thorup
Automation and low cost is an oxymoron sort of like jumbo shrimp. Automation will set you back $20,000-100,000. Optical comparitors aren't cheap either. Low cost means good eyeballs, a "golden" sample board and up-to-date documentation. Also low c
