Understanding warpage of package attach locations on PCBs under reflow temperature conditions is critical in surface mount technology. A new industry standard, IPC 9641, addresses this topic directly for the first time as an international standard.
This paper begins by summarizing the sections of the IPC 9641 standard, including, measurement equipment selection, test setup and methodology, and accuracy verification. The paper goes further to discuss practical implementation of the IPC 9641 standards. Key advantages and disadvantages between available warpage measurement methods are highlighted. Choosing the correct measurement technique depends on requirements for warpage resolution, data density, measurement volume, and data correlation. From industry experience, best practice recommendations are made on warpage management of PCB land areas, covering how to setup, run, analyze, and report on local area PCB warpage.
The release of IPC 9641 shows that flatness over temperature of the package land area on the PCB is critical to the SMT industry. Furthermore, compatibility of shapes between attaching surfaces in SMT, like a package and PCB, will be critical to product yield and quality in years to come....
Explain your requirement *
Our Newsletters keep you up to date with the PCB Industry
Our Newsletters keep up to date with the PCB Update
By signing up for our newsletter you agree to our Terms of Service and acknowledge receipt of our Privacy Policy.
Note: File Size should be less than 10MB.
Create an account on PCB Directory to get a range of benefits.
Login to PCB Directory to download datasheets, white papers and more content.
By creating an account with us you agree to our Terms of Service and acknowledge receipt of our Privacy Policy.
OR