Flex PCB design require a different approach then rigid PCB Avoid Bending at the Corners. Use Curved Traces Do Not Abruptly Change Trace Widths Use Hatched polygons. Add Pad Support For More Info click here
There are various package in electronics for PCB application there are multiple component ..below link Package info
Three possible minimum hole sizes: As per IPC 2222 Minimum Hole Size = Maximum Lead Diameter + 0.25mm Minimum Hole Size = Maximum Lead Diameter + 0.20mm Minimum Hole Size = Maximum Lead Diameter + 0.15mm A Minimum Hole Size = 0.55mm + 0.25mm = 0.80mmB Minimum Hole Size = 0.55mm + 0.20mm = 0.75mm C Minimum Hole Size = 0.55mm + 0.15mm […]