| http://etasmt.com/te_news_industry/2021-08-31/23964.chtml
(from room temperature to 150°C) Solder paste collapse -- ramp up too fast The solvent in flux cannot vapour thoroughly, so the viscosity of the solder paste will be decreased and cause the paste collapse Soldering ball -- ramp up
Imagineering, Inc. | https://www.pcbnet.com/blog/identifying-and-correcting-solder-bridge-defects/
. Unfortunately, there are numerous causes that can produce solder bridging. To produce as quickly and efficiently as possible, finding the root cause of this defect is critical
Imagineering, Inc. | https://www.pcbnet.com/blog/how-to-prevent-a-solder-ball-defect/
. Being as common as it is, manufacturers have come to recognize many of the underlying causes that cause solder ball defects. In this blog, we outline everything you need to know about solder balls, what you can do to avoid them, and potential steps for their removal
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_son-qfn-calculations_topic889.xml
: SON / QFN Calculations SON / QFN Calculations : Ooops! I just noticed that the... Author: jnelso09Subject: 889Posted: 15 Mar 2013 at 1:34pmOoops! I just noticed that the previously posted pic shows exactly the opposite of what I'm talking about - The center land is minimized and the outer lands are maximized
| https://www.eptac.com/faqs/ask-helena-leo/page/4
: Are there any benefits to using deionized water versus tap water on the solder iron sponges? What is the best type of water to use
Surface Mount Technology Association (SMTA) | https://www.smta.org/iceet/workshops.cfm
fabrication, assembly and test. About the Instructor: Dale is a Senior Staff DFX Strategy Engineer with Plexus Corporation primarily involved with DFX analysis, root cause failure analysis and definition/correlation of design, process, legislative and
Surface Mount Technology Association (SMTA) | https://www.smta.org/smtai/courses.cfm
stencil stepping, printing 0201M or 008004 imperial components, and the SMTA Miniaturization solder paste test vehicle. If you are already familiar with the solder paste printing process and want to get up to date on the latest technology available, this is the course for you. PDC06
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/topic889&OB=DESC.html
: 20 Post Options Post Reply Quote jnelso09 Report Post Thanks(0) Quote Reply Topic: SON / QFN Calculations Posted: 15 Mar 2013 at 1:34pm Ooops! I just noticed that the previously posted pic shows exactly the opposite of what I'm talking about - The center land is minimized and the outer lands are maximized
PCB Libraries, Inc. | https://www.pcblibraries.com/Forum/son-qfn-calculations_topic889_post3258.html
for high-reliability hardware. For instance, we have found several vendors that recommend a solder mask defined center pad. We have found that when the center pad is completely surrounded by solder mask voiding in the solder joint increases and the ability to clean flux residues out from under these parts is difficult if not impossible
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic889&OB=ASC.html
for high-reliability hardware. For instance, we have found several vendors that recommend a solder mask defined center pad. We have found that when the center pad is completely surrounded by solder mask voiding in the solder joint increases and the ability to clean flux residues out from under these parts is difficult if not impossible
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