Electronics Forum | Mon Dec 02 16:25:06 EST 2002 | jimlew
In doing process qualifications for 0201 caps, has anyone taken cross-sections and discovered cracks / hairline fractures / voids between the metalization on the end and the ceramic itself? (not cracks in the solder joint) We are well within the cap
Electronics Forum | Thu May 23 05:38:26 EDT 2019 | je_arrow_tech
We have been having some issues recently with a TSOP-II 54 pin, where upon second reflow the part will lift at end one, most of the time the solder will pull up with it and still connect but I still worry about strain on the component as well as it i
Electronics Forum | Thu Mar 27 11:39:27 EST 2003 | kenlchin
Hi,mantis, I has experienced this case.when we run a model ,misalignment and tombstone of some 0805 resistors and 1206 caps always occured.we have taken many actions,such as adjusting reflow parameter&printing parameter,checking pcb and parts soldera
Electronics Forum | Fri Mar 21 14:44:02 EST 2003 | Stephen
I once worked for a new branch of a company. We had a board where one of two tants would shift in the oven. When I phoned up HQ because they had ran the board before as soon as I said the product name their guy said "C148 shifts in the oven" He knew
Electronics Forum | Fri Oct 28 04:56:12 EDT 2016 | lilybell
I read a few posts here about resistor in led applications. The thing is, the resistor has clarified as this shows:was always use with a power source delivering a higher forward voltage than the led could tolerate(ex: a 9volt battery hook up to a 3w
Electronics Forum | Mon Aug 27 10:58:44 EDT 2001 | Ryan Jennens
Steve- We had the same trouble with 0805 Panasonic film caps. We had some tombstoning and open solder joints (non-wetting). We found two problems...like you, we changed our pad design to meet their recommendation. Also, they were able to suppl
Electronics Forum | Mon Sep 28 09:18:30 EDT 1998 | Ben Wilmot
The majority of SMT resistors use the following notation. 10 X eg 153 represents 1k5 resistor The third digit in the sequence denotes the number of zeros to add after the first two digits giving the value in ohms. Many Caps will follow the same nota
Electronics Forum | Thu Oct 16 15:24:33 EDT 2003 | daanterstegge
An explanation that could possibly help (depending on the exact code on these parts) is on http://www.marsport.demon.co.uk/smd/res.htm. The author of this ends the page with a "Personally, I'd check with an ohm-meter!". Daan Terstegge http://www.smt
Electronics Forum | Thu May 11 12:44:04 EDT 2006 | slthomas
One of our customers' products has a couple of adjacent 0603 packages (one resistor, one cap) that are .010" apart. They are side by side, not end to end. The adjacent pads between the two parts are electrically connected so bridging isn't an issu
Electronics Forum | Mon Dec 02 13:55:49 EST 2002 | stepheno
Where I worked we used a different chip bonder. When we had trouble with flux entrapment in the epoxy from the wave solder, we checked the date of the epoxy. The tube didn't have one but the manufacturer gave a shelf life of 6 months and then the s
