日本語
Hi! I need help understanding all the terms about PCB manufacturing... Is that google search often throws me to manufacturers but not to any definition. So I hope this post helps others in the future. This example comes from
Minimum passive component size 0201
* what does that unit refer to? is it some standard?
Minimum pitch size on BGA components 0.4 mm
* what is a BGA component?
Parts procurement Kitted or turnkey
* what is procurement, what is kitted and what is turnkey?
Solder types Tin/lead reflow or lead free RoHS compliant reflow
* I guess that both solder tipes are general purpose, but one is more ecological. Is that right?
Conformal coating Yes
* what is conformal coating?
Stainless solder steel stencil Frameless or framed.
* is this the stencil used to flow solder? Is it made of steel?! What is the frame feature for?
Functional test after assembly Yes. Need customer to send over test firxture or test design.
* where can you learn how to set up these tests?
I know these are a lot questions, I guess that for someone who studied engineering may be obvious, but all these terms are completely unknown to me; so thanks in advance for your help!
- Comments(1)
A****min
Dec 03.2019, 18:30:13
1. Yes. EIA chip component codes.
2. Ball Grid Array. JFGI
3. Check a dictionary. "Kitted" is, you bought enough parts to assemble the boards (plus extras), and you send them a kit. "Turnkey" is, they order the parts themselves (with nominal convenience and overage costs added in, you see).
4. Lead free is required to sell in Europe. There may be a cost difference too. Quote both and see!
5. Conformal coating is goo applied over the board, after assembly, to protect against corrosion and stuff. JFGI for more info.
6. Stencil is for placing solder paste prior to assembly (pick and place) and soldering (reflow).
7. Assembly testing can be done automatically (flying probe). Functional testing would probably require you to create, and send to them, a testing plan, which they have an employee perform. You may need to supply equipment to do this (e.g., programming dongles and software, custom support devices, test fixtures), or they probably have facilities to create these things themselves (in which case, they have to add design cost; so, this would only be something you would do for production testing, when you don't have in-house test building experience).
