And they have suggest me to calculate OAR as per following formulas.. But I am too much confused from this.
Calculation of OAR:OAR = (Cupper pad diameter – TOOLSIZE)/2
TOOLSIZE = ENDSIZE + 0.10mm for all PTH holes of 0.45mm(ENDSIZE) and smaller
+ 0.15mm for all PTH holes bigger then 0.45mm(ENDSIZE)
+ 0.05mm for all NPTH holes.
Example calculation for OAR in your design on the 0.30mm ENDsize drills:
OAR = (0.4191mm – (0.30mm + 0.10mm))/2
= (0.4191mm – 0.40mm)/2
= 0.0191mm/2= 0.0096mm
If Any one knows the formula to calculate OAR for different Drill sizes??
Please let me know if anybody knows solution.
They have provide me one documents showing my errors which i have attached.
So you can find that attached file more comfort.