Electronics Forum | Mon Apr 17 21:09:38 EDT 2000 | Bene
Do you know the wetting speed of the solder paste you are using? Ask your vendor for this measurement. I have observed this issue on several products using pastes with wetting speeds faster than 1 second. As stated previously, smaller packages are m
Electronics Forum | Tue Mar 28 16:23:44 EST 2000 | Michael Parker
While attempting to use the IPC-SM-782, land pattern calculator, I came across the term Component ID. (for example - "C1005") I am not sure what this is. I wanted to verify the IPC recommended land pattern for a Chip Capacitor with 0603 size. Can any
Electronics Forum | Mon Mar 13 20:16:39 EST 2000 | Dreamsniper
If an operator loaded a wrong value of component with the same packaging, say 0805, on a feeder slot. how will the program verify this situation? or an operator interchanged 2 0805 capacitors with different values from feeder slot #5 and feeder slot
Electronics Forum | Wed Feb 23 16:38:41 EST 2000 | Michael Parker
I have experienced tombstone with one brand of 0603 capacitor. Swapping in another brand (actually two different brands to date) has stopped the tombstone. I have measured the parts (length, width and height). There does not appear to be any apprecia
Electronics Forum | Thu Mar 08 16:02:58 EST 2001 | arturoflores
You did not mention to change the solder paste to another formulation or brand.We used to have that kind of non wetting problem on 0402 cap when we used Alpha's LR737(63/37) Type 4 No Clean and the solution was to change the solder paste to Alpha's L
Electronics Forum | Thu Mar 08 22:24:45 EST 2001 | davef
Sounds like you've done a good job of troubleshooting. Two thoughts are: 1 An alternative to using a hotter flux that the others mentioned is to use components with more solderable terminations. [A firm grasp on the obvious.] 2 You spoke about
Electronics Forum | Fri Mar 09 08:25:13 EST 2001 | CAL
We have seen some problems with component end cap solder terminations not being symetrical. i.e. If one end on the cap has a larger solder ternination this sometimes is enough surface area during reflow to lift the opposite side of the component. We
Electronics Forum | Fri Mar 16 18:32:06 EST 2001 | djarvis
Anyone using "Hitano" 0805 capacitors please check their values before running. I just got stung by parts labeled as 100nf when they were in fact 10nf. We found five out of fifteen reels in the smd room incorrect, who knows what stores will find. P/N
Electronics Forum | Wed Sep 20 10:00:40 EDT 2000 | Erick Russell
Yes, some testing of soldering chip capacitors onto ceramic substrates with high temperature paste proved successful. Die attachment can be achieved using this technology as well. The underfill of the die becomes a critical factor in rework potentia
Electronics Forum | Wed Jun 13 17:15:48 EDT 2001 | medernach
Yes, I've seen it recently and it's most likely a component problem. A cap is essentially a sandwich comprised of multiple layers. the layers are either wet film or dry film. The end terminals may either be hot soldered or sputtered so there are a
