26 poor wetting on qfp leads results

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

. The Lead-Frame Thickness on a common DPAK is 0.65 mm but the Lead Thickness on a 0.50 mm pitch QFP or SOP is 0.15 mm. They do not require the same Toe value PCB Libraries, Inc

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

. The Lead-Frame Thickness on a common DPAK is 0.65 mm but the Lead Thickness on a 0.50 mm pitch QFP or SOP is 0.15 mm. They do not require the same Toe value PCB Libraries, Inc

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

. The Lead-Frame Thickness on a common DPAK is 0.65 mm but the Lead Thickness on a 0.50 mm pitch QFP or SOP is 0.15 mm. They do not require the same Toe value PCB Libraries, Inc

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

;However, the FED in Germany did pick up the Proportional Pad Stack model and published a book on it by Rainer Taube.  IPC-J-STD-001 Gull Wing Leads and Solder Joints

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

. The Lead-Frame Thickness on a common DPAK is 0.65 mm but the Lead Thickness on a 0.50 mm pitch QFP or SOP is 0.15 mm. They do not require the same Toe value PCB Libraries, Inc

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

. The Lead-Frame Thickness on a common DPAK is 0.65 mm but the Lead Thickness on a 0.50 mm pitch QFP or SOP is 0.15 mm. They do not require the same Toe value PCB Libraries, Inc

PCB Libraries, Inc.

” box Mid Year Update A Review of Some Commonly Asked Questions 4 Topics   Poor wetting and its causes   The impact of cutting into the solder joints while trimming leads

| https://www.eptac.com/wp-content/uploads/2021/11/webinar_eptac_06_16_10.pdf

PCB Libraries Forum : Wave Soldering SOT23

PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_wave-soldering-sot23_topic995.xml

. All this information is important to us. Poor Wetting can be caused by contamination of the solder or improper solder temperature or conveyor belt moving too fast.  

PCB Libraries, Inc.

Process and design-related causes-News-Reflow oven,SMT Reflow Soldering Oven-cmsadmin

| http://etasmt.com/cc?ID=te_news_bulletin,23570&url=_print

: • Non-coplanar leads on the component • Excessive warpage of the PCB or substrate • Poor wetting • Insufficient amount of solder due to improper printing parameters

Leadfree

Heller Industries Inc. | https://hellerindustries.com/wp-content/uploads/2018/07/leadfree.pdf

Material:T, S, C, A Atmosphere:Nitrogen Temperature:230°C Excellent Wetting, Reduced Temperature Shows No Effect on Joint Formation 20 mil QFP Lead PROPRIETARY AND CONFIDENTIAL INFORMATION Pages: 20 of 24 Rev Level: 1 Rev Date: 1/03/01 Test # 12 Material

Heller Industries Inc.