CHOOSING A SURFACE FINISH FOR FINE-PITCH COMPONENTS

CHOOSING A SURFACE FINISH FOR FINE-PITCH COMPONENTS

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by CARMEN ZHENG @ www.seeedstudio.com

Today we are going to share with you a real case study involving a Seeed Fusion PCBA customer’s design. At the time of placing the order, the customer requested the default HASL surface finish, but listed in their Bill of Materials was a 0.4mm BGA. It’s a small BGA with only four balls in the array, but the combination of 0.4mm pitch BGA and HASL surface finish should ring alarm bells, and here’s why:

CHOOSING A SURFACE FINISH FOR FINE-PITCH COMPONENTS – [Link]

About mixos

Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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