Sunday, 10 May 2015

pcb - What is a "solder mask opening" in a footprint?


In the Luxeon LED datasheet under Solder Pad Design section there is a diagram with 3 crosses around the edges of the LED. They are identified as "4x Soldermask Opening (hatched area)" but I am not entirely sure what it is exactly or why it is used. What are they, what do they achieve and how should they be drawn in Eagle or other software?


enter image description here



Answer




  1. It is for easy alignment with respect to the outline of the package.

  2. The Luxeon outline shows perfect alignment and easier for optical correction with a vision system on the pick N place machine.


enter image description here


-

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)

arduino - Can I use TI's cc2541 BLE as micro controller to perform operations/ processing instead of ATmega328P AU to save cost?

I am using arduino pro mini (which contains Atmega328p AU ) along with cc2541(HM-10) to process and transfer data over BLE to smartphone. I...