STM32F103C4H6ATR STMICROELECTRONICS [STMicroelectronics], STM32F103C4H6ATR Datasheet - Page 72

• Manufacturer Part Number: STM32F103C4H6ATR
• Description: Low-density performance line, ARM-based 32-bit MCU with 16 or 32 KB Flash, USB, CAN, 6 timers, 2 ADCs, 6 communication interfaces
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

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Figure 38. Recommended PCB design rules for pads (0.5 mm pitch BGA)
1. Non solder mask defined (NSMD) pads are recommended
2. 4 to 6 mils solder paste screen printing process
Dpad
Dsm
Doc ID 15060 Rev 3
Pitch
D pad
Dsm
Solder paste
0.5 mm
0.27 mm
0.35 mm typ (depends on
the soldermask registration
tolerance)
0.27 mm aperture diameter
ai15495