21 qfp none wetting results

Leadfree

Heller Industries Inc. | https://hellerindustries.com/wp-content/uploads/2022/04/leadfree.pdf

: Nitrogen Temperature:240°C Excellent Wetting in Toe and Heel – Small, Acceptable Voids Cross Section of QFP Solder Fillet PROPRIETARY AND CONFIDENTIAL INFORMATION Pages: 16 of 24 Rev Level: 1 Rev Date: 1/03/01 Test # 8 Material

Heller Industries Inc.

20 EWS Questions of August.PPT

| https://www.eptac.com/wp-content/uploads/2021/11/webinar_eptac_08_19_09.pdf

: Are toe fillets required by specifications 001 and 610?  Specifications require end joint width requirements but none require the solder to be on the end of the lead.  Why? 8

IPC-J-STD-001 Gull Wing Leads and Solder Joints - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/ipcjstd001-gull-wing-leads-and-solder-joints_topic2587_post10535.html

: Wetting is evident The F dimension for Heel Fillet for Class 2 Fabrication is: (G) + 50% (T) The F dimension for Heel Fillet for Class 3 Fabrication is: (G) + (T

PCB Libraries, Inc.

IPC-J-STD-001 Gull Wing Leads and Solder Joints - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/ipcjstd001-gull-wing-leads-and-solder-joints_topic2587_post10857.html

: Wetting is evident The F dimension for Heel Fillet for Class 2 Fabrication is: (G) + 50% (T) The F dimension for Heel Fillet for Class 3 Fabrication is: (G) + (T

PCB Libraries, Inc.

IPC-J-STD-001 Gull Wing Leads and Solder Joints - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/topic2587&OB=DESC.html

0.65 mm and the Toe should be 0.50 mm for the best Toe Fillet.  The DPAK is a separate component family Terminal Lead Form in Library Expert with different Toe values than SOP, QFP, SOT and SOD

PCB Libraries, Inc.

IPC-J-STD-001 Gull Wing Leads and Solder Joints - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/ipcjstd001-gull-wing-leads-and-solder-joints_topic2587_post10857.html

: Wetting is evident The F dimension for Heel Fillet for Class 2 Fabrication is: (G) + 50% (T) The F dimension for Heel Fillet for Class 3 Fabrication is: (G) + (T

PCB Libraries, Inc.

IPC-J-STD-001 Gull Wing Leads and Solder Joints - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/ipcjstd001-gull-wing-leads-and-solder-joints_topic2587.html

: Wetting is evident The F dimension for Heel Fillet for Class 2 Fabrication is: (G) + 50% (T) The F dimension for Heel Fillet for Class 3 Fabrication is: (G) + (T

PCB Libraries, Inc.

IPC-J-STD-001 Gull Wing Leads and Solder Joints - PCB Libraries Forum

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic2587&OB=ASC.html

: Wetting is evident The F dimension for Heel Fillet for Class 2 Fabrication is: (G) + 50% (T) The F dimension for Heel Fillet for Class 3 Fabrication is: (G) + (T

PCB Libraries, Inc.

PCB Libraries Forum : IPC-J-STD-001 Gull Wing Leads and Solder Joints

PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/RSS_ipcjstd001-gull-wing-leads-and-solder-joints_topic2587.xml

0.65 mm and the Toe should be 0.50 mm for the best Toe Fillet. The DPAK is a separate component family Terminal Lead Form in Library Expert with different Toe values than SOP, QFP, SOT and SOD. 

PCB Libraries, Inc.

Are Voids in Solder Joints Really an Issue? - EPTAC - Train. Work Smarter. Succeed

| https://www.eptac.com/are-voids-in-solder-joints-really-an-issue/

! What are we supposed to do? There are articles from all over the world explaining how they come about and what the problem is by having them, which is none by the way. Check the article