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18 Threads found on Solder Ipc
0201 ... pain in the butt. They float easily on solder paste. Assembly houses hate them.
Many SMD libraries and manufacturer footprint suggestions also define an occupied area or "courtyard" to account for placement tolerances. It usually requires a larger component spacing than minimum solder mask.
I would follow the ipc-7351 recommendations and have your solder mask opening the same size as the pads.
If soldering is done by stove, I guess thermal vias is not an issue. The problem exists if you espect perform further maintenance, due to heat will be drawn more accentuated, reducing thermal gradient. +++
Most of the jobs want you be have ipc J-STD-001 and ipc-A-610 certifications now to solder I live in California and I called every community college and other colleges and they don't offer any class to get ipc J-STD-001 and ipc-A-610 certification How to I get these certifications please? I need these (...)
Marce: As i said Wave soldering is used for some low cost application,it is not totally ruled out. In past i have done some boards which gone for wave soldering + selective soldering. I understand now a days reflow soldering is much in use. Anonymous_Ricky: U rightly said ,ipc7351 is newest standard for (...)
For start You should begin with smaller project, later you can make some programmer for PIC and AVR. Buy hot air solder station. Practice and desoldering also. You can read this material : EPE "Basic soldering Guide" soldering 101
I think it is not really the size of the solder fillet but the difference between the pad and component leg dimension. So a negative value means the pad is smaller than the component leg, at least in one dimension. Keith
Always design your stencil to the ipc-7351 standard, which is 1:1 stencil artwork, you design the stencil at the same time you design the board. It is just a artwork that shows where the appertures are to be to deposit solder paste for the reflow of components, mainly surface mount devices, but also increasingly some through hole components such a
ipc-7351 covers any footprint you want to create, what ipc-7351 does is set up the tolerences and pad sizes required for heal, to and side solder fillets etc, placement courtyards, also the naming format for both the footprint but also the padstack. If you buy the ipc-7351 spec you get a copy of the calculator, worth the money.
You dont have to tent the vias, you can achieve the same goals by modifying the shape and layout of the solder paste screen. Have a look at ipc-7093.
Hi, I've read the following in ipc 2221 : solder resist coating adhesion to melting metal surfaces (solder coating, tin/lead plating, etc.) cannot be assured, as boards are subjected to temperatures that cause redistribution of the melting metals. When solder resist coating is required over melting metal surfaces, (...)
You can refer to AN233 solder Reflow Recommendation as ipc/JEDEC J-STD-020C standard.
a glue mask is used to hold the components during the solder proces. Electrically nonconductive adhesive materials used for attachment of surface mount components should meet the requirements of ipc-SM-817. If you want to replace the soldering proces by using Electrically Conductive Adhesives you can check ipc-3406 (...)
Is this document related to Qualification and performance of permanent solder mask.. kindly PM me...
Its depend up on how the PCB Assembler wants it. consult ur pcb assembler. what i use is circle 40 mils smd with 60 mils mask open I use the same, but a much larger opening for soldermask (at least 80 thousandths- cameras for optical placement don't like to see any reflections close by) Also on small pitch high count SSO
Hi there, I'm not sure if there are any standard soldering school but i know that there is a international body that set the standards and they train people around the world. It is call ipc u can check this website .
I am looking for the foot print of SuperSOT-3 Package. Can anybody please provide me the solder pad dimension for the above mentioned package. Is there any pdf file containing all the package and their foot print details. If anybody came across that please inform me. Thanx in advance. Regards, Vamanan Kutty