Welcome to Shenzhen Grande Electronic Co., Ltd.!
Shenzhen Grande Electronic logo
E-mail Us for a Quote:
sales88@greattong.com
Call us now:
+86-755-83261869

News


PCB Assembly: How to optimize the reflow profile?

Time:2017-06-15 14:20:41 Click:

According to the recommendation by the IPC association, the generic Pb-free solder reflow profile is shown below. The GREEN area is the acceptable range for the whole reflow process. Does it mean that every spot in this GREEN area should fit your board reflow application? The answer is absolutely NO! 
typical pb-free solder reflow profile
The PCB thermal capacity is different according to the material type, thickness, copper weight and even the shape of the board. It is also quite different when the components absorb the heat to warm up. Big components may need more time to heat up than small ones. So, you must analyze your target board first before creating a unique reflow profile.
▪ Make an virtual reflow profile.
A virtual reflow profile is based upon soldering theory, the recommended solder profile from the solder paste manufacturer, size, thickness, cooper weight, layers of the board and size, and the density of the components.
▪ Reflow the board and measure the real time thermal profile simultaneously.
▪ Check the solder joint quality, PCB and component status.
▪ Burn-in a test board with thermal shock and mechanical shock to check the board’s reliability.
▪ Compare real-time thermal data with the virtual profile.
▪ Adjust the parameter setup and test several times to find the upper limit and bottom line of the real-time reflow profile.
▪ Save optimized parameters as per the target board’s reflow specification.

Previous:PCB Assembly: How to Maintain a Reflow Oven?

Next:PCB Layout: How To Place Diodes Using Silk Screen Marks


Request an Official Quote

Questions

E-MAIL

File Upload

Upload a list of files

    Please upload your Gerber files and BOM. You can upload an unlimited number of files as long as the total size of all files does not exceed 20 MB. To ensure you receive your official quote in less than 24 hours, please include the quantity of circuit boards for which you would like a quote.

    If you require that we sign a Non-Disclosure Agreement (NDA), please send it to us prior to sending your files and we will be happy to accommodate.

     
    HOME About Us Services Quality Pb-Free News Contact Us


    Copyright ® 2017,Shenzhen Grande Electronic Co., Ltd. All Rights Reserved. Sitemap