via-in-pad issue (standard technology)
Views : 1359
Author : meidear
Update time : 2020-03-10 16:51:49
DFM/DFA/DFT Tips&Tricks - TIP #03 => via-in-pad issue (standard technology)
Whenever possible, always use enough clearance for the solder mask between the via and the copper pad to prevent solder flow into the via hole and can cause the solderability issues during the assembly and manufacturing process.
This note applies only to standard technology, especially typical 2-layer PCBs.
Please remember, that for multilayer HDI PCBs there is a similar via-in-pad technique (mostly used for small pitch BGAs), but that vias are additionally filled and plated.
There are some exceptions, such as RF circuits, high-current designs or BGA layouts, where that recommendation can be omitted.
Whenever possible, always use enough clearance for the solder mask between the via and the copper pad to prevent solder flow into the via hole and can cause the solderability issues during the assembly and manufacturing process.
This note applies only to standard technology, especially typical 2-layer PCBs.
Please remember, that for multilayer HDI PCBs there is a similar via-in-pad technique (mostly used for small pitch BGAs), but that vias are additionally filled and plated.
There are some exceptions, such as RF circuits, high-current designs or BGA layouts, where that recommendation can be omitted.
Related News
LED lighting PCB (Printed Circuit Board) Solutions
Jan .01.2025
LED lighting PCB (Printed Circuit Board) solutions
CEM-3 Thermal conductive material
IMS pcb Flexible pcb Copper-base pcbs
CEM-3 Thermal conductive material
IMS pcb Flexible pcb Copper-base pcbs
How many types of surface treatment processes for PCB?
Dec .20.2024
PCB surface treatment processes
HASL,OSP ENIG,Immersion Silver,Immersion Tin hard Gold
nickel P-alladium gold
HASL,OSP ENIG,Immersion Silver,Immersion Tin hard Gold
nickel P-alladium gold
The material difference between high-frequency PCB and high-speed PCB
Sep .03.2024
Professional production, high-frequency, high-speed, HDI, LED lighting board, (Flex, Rigid-Flex,) (Wangling, Taiyao, Nanya, Isola, Rogers, Pana-sonic,) Quotation email: mkt@me-pcb.com
High-performance Thick copper heavy Copper PCB 6Oz 10Oz 20Oz
Aug .09.2024
Heavy Copper PCB 6Oz 10Oz 20Oz Multi-layer board
Professional customized production
in Shenzhen Shajin
Professional customized production
in Shenzhen Shajin