88 via holes need to close in stencil results

QFN Thermal Via Pitch - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/qfn-thermal-via-pitch_topic2914_post11617.html

.  According to the IPC-7093A you can also solder mask define the thermal pad to dam in the paste mask to prevent it from flowing into via holes

PCB Libraries, Inc.

QFN Thermal Via Pitch - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/qfn-thermal-via-pitch_topic2914_post11613.html

.  According to the IPC-7093A you can also solder mask define the thermal pad to dam in the paste mask to prevent it from flowing into via holes

PCB Libraries, Inc.

QFN Thermal Via Pitch - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/qfn-thermal-via-pitch_topic2914.html

.  According to the IPC-7093A you can also solder mask define the thermal pad to dam in the paste mask to prevent it from flowing into via holes

PCB Libraries, Inc.

QFN Thermal Via Pitch - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/topic2914&OB=ASC.html

.  According to the IPC-7093A you can also solder mask define the thermal pad to dam in the paste mask to prevent it from flowing into via holes

PCB Libraries, Inc.

QFN Thermal Via Pitch - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic2914&OB=DESC.html

.  According to the IPC-7093A you can also solder mask define the thermal pad to dam in the paste mask to prevent it from flowing into via holes

PCB Libraries, Inc.

QFN Thermal Via Pitch - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic2914&OB=ASC.html

.  According to the IPC-7093A you can also solder mask define the thermal pad to dam in the paste mask to prevent it from flowing into via holes

PCB Libraries, Inc.

The Application of the Pin-in-Paste Reflow Process-SMT Technical-Reflow oven,SMT Reflow Soldering Ov

| http://etasmt.com:9060/te_news_industry/2021-08-31/23962.chtml

°C over several seconds. The component’s geometry such as pin length and free space also need to be reviewed in order to make the right decision

The Application of the Pin-in-Paste Reflow Process-SMT Technical-Reflow oven,SMT Reflow Soldering Ov

| http://etasmt.com/te_news_industry/2021-08-31/23962.chtml

°C over several seconds. The component’s geometry such as pin length and free space also need to be reviewed in order to make the right decision

PCB Assembly Equipment List: What Is Used to Manufacture PCB?

Imagineering, Inc. | https://www.pcbnet.com/blog/pcb-equipment-101-what-equipment-is-used-to-pcb-assembly/

. Next, a blade drags across the stencil and spreads the solder paste evenly in the holes so only the areas of later contact get a layer of the glue

Imagineering, Inc.

IPC-7093A BTC: QFN Solder Mask Defined Thermal Pad - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/ipc7093a-btc-qfn-solder-mask-defined-thermal-pad_topic2154_post11220.html

to prevent solder from flowing down open via holes. No need to plug these vias and save fabrication costs at the same time creating a reliable solder joint

PCB Libraries, Inc.