WLCSP-25(2.59x2.59) routing (WLCSP-25(2.59x2.59) C1851939
WLCSP-25(2.59x2.59) routing (WLCSP-25(2.59x2.59) C1851939

35*******8A
2023-02-23 00:36 AM
I'm trying to route WLCSP-25(2.59x2.59) routing (WLCSP-25(2.59x2.59) C1851939 in a four layer board. Capabilities pages say I could use a 0.09mm trace width but must maintain a .127 clearance for PCBA. How should I measure the .127 clearance? From the edge of the pad, the solder mask expansion or from the center of the pad?
JLCPCB
2023-03-21 20:03 PM
The .127 clearance is from the solder mask expansion to the trace.