Electronics Forum | Thu Dec 14 04:42:11 EST 2017 | jineshjpr
Can anybody suggest how can I achieve good solderability in convectional reflow oven If I reduced Convection Air Speed 80%. The whole purpose is to reduce 0402 LED tilting in the convectional reflow and the PCB having QFN with 60 to 120 sec soak, 30
Electronics Forum | Thu Dec 14 05:07:55 EST 2017 | tsvetan
picture of the problem would help people to speculate what you do wrong
Electronics Forum | Thu Dec 14 15:05:17 EST 2017 | emeto
I am pretty sure, you are looking into the wrong spot. Your paste is too much, or your part has very inconsistent narrow leads(that includes wrong pad design as well.)
Electronics Forum | Wed Dec 20 07:16:16 EST 2017 | stephendo
I agree with Evtimov. What he didn't point out is that the surface tension of the solder would vastly overwhelm any force from air flow.
Electronics Forum | Tue Oct 15 11:16:30 EDT 2019 | charliedci
We have been using Cree 3 color LED's (CLV6A-FKB) in many products for several years (pic attached). At the rate of 3 to 5% of the units assembled with this LED, the Red LED fails. After touch up with soldering iron it functions. This happens to the
Electronics Forum | Mon Apr 18 12:05:22 EDT 2022 | proceng1
Is it the CREE with the soft dome? We had to get specially made nozzles for our SAMSUNG machines to pick up cree LEDs correctly. They are basically rubber tipped. We bought from Count on Tools website.
Electronics Forum | Fri May 13 19:33:37 EDT 2022 | alex22
Hi Chris. Thanks for sharing these details. We are working with Cree XP-G3 LED (3535). We bought urethane nozzle from CoT (recommendation from Cree), but it didn't solve problem of LED sticking to nozzle. Cleaning nozzle with isopropanol (other recom
Electronics Forum | Sun May 20 00:11:45 EDT 2012 | kiss
We are mounting 3528 package LEds with pick & > place machine.The problem is , nozzle picks up > the LED , but it stick to the nozzle & not > placed. Then it gives error in the next cycle. > Can anybody suggest the solution? Please advise on mo
Electronics Forum | Mon May 21 08:51:14 EDT 2012 | fredc
We have been seeing this in the nozzles we have made. We will building all new LED nozzles out of teflon where physically possible. Many of the new Cree LED recomendations are for teflon nozzles. In some that teflon was not recomended teflon was the
Electronics Forum | Mon May 27 07:16:27 EDT 2013 | mskler
We have an LED 0603 package, We are using stencil of 5 Mil, Before Reflow placement is perfact but after reflow it tis found that there is more than 30% LED are tilt. Can the speed of Fan in Reflow can help or I have to reduce the PAD opening in Sten
