Electronics Forum | Tue Apr 22 08:55:54 EDT 2014 | davef
I assume that you're talking about wanting to solder to metal tabs that are spot welded to the battery terminal. These tabs are not meant to be soldered. The metal was special selected for welding. In the old days, you could buy plumbing flux at th
Electronics Forum | Fri Apr 25 14:49:34 EDT 2014 | isd_jwendell
If the tab is Sn plated, you can solder to it as long as your iron has enough power (watts). If you continue to have trouble then it probably isn't Sn plated.
Industry News | 2018-12-08 03:29:29.0
SMT Dictionary – Surface Mount Technology Acronym and Abbreviation
Industry News | 2012-08-22 15:57:01.0
IPC – Association Connecting Electronics Industries® presented Special Recognition, Distinguished Committee Leadership and Committee Service Awards at IPC Midwest Conference & Exhibition
Technical Library | 1999-05-07 11:28:39.0
There are many things that can go wrong when soldering to gold plate over nickel surfaces. First of all, we know that gold and solder are not good friends, as any time solder comes into contact with gold, something seems to go wrong. Either the solder bonds to the gold and eventually pulls off as the tin and gold cross-migrate, leaving voids; or the solder completely removes the gold and is expected to bond to the metal which was under the gold.
Technical Library | 2020-07-29 19:58:48.0
The majority of flexible circuits are made by patterning copper metal that is laminated to a flexible substrate, which is usually polyimide film of varying thickness. An increasingly popular method to meet the need for lower cost circuitry is the use of aluminum on Polyester (Al-PET) substrates. This material is gaining popularity and has found wide use in RFID tags, low cost LED lighting and other single-layer circuits. However, both aluminum and PET have their own constraints and require special processing to make finished circuits. Aluminum is not easy to solder components to at low temperatures and PET cannot withstand high temperatures. Soldering to these materials requires either an additional surface treatment or the use of conductive epoxy to attach components. Surface treatment of aluminum includes the likes of Electroless Nickel Immersion Gold plating (ENIG), which is extensive wet-chemistry and cost-prohibitive for mass adoption. Conductive adhesives, including Anisotropic Conductive Paste (ACP), are another alternate to soldering components. These result in component substrate interfaces that are inferior to conventional solders in terms of performance and reliability. An advanced surface treatment technology will be presented that addresses all these constraints. Once applied on Aluminum surfaces using conventional printing techniques such as screen, stencil, etc., it is cured thermally in a convection oven at low temperatures. This surface treatment is non-conductive. To attach a component, a solder bump on the component or solder printed on the treated pad is needed before placing the component. The Aluminum circuit will pass through a reflow oven, as is commonly done in PCB manufacturing. This allows for the formation of a true metal to metal bond between the solder and the aluminum on the pads. This process paves the way for large scale, low cost manufacturing of Al-PET circuits. We will also discuss details of the process used to make functional aluminum circuits, study the resultant solder-aluminum bond, shear results and SEM/ EDS analysis.
SMTnet Express, November 6, 2014, Subscribers: 23500, Members: Companies: 14091, Users: 37109 Effect of Process Variations on Solder Joint Reliability for Nickel-based Surface Finishes Hugh Roberts, Sven Lamprecht, Gustavo Ramos, Christian Sebald
| https://www.eptac.com/soldertips/soldertips-solderability-issues-with-nickle-plated-surfaces/
: Solderability Issues with Nickle Plated Surfaces Question: We are working with components with leads of tin/lead over nickel. After the manufacturing processes, some of the pins are exhibiting what appears to be flaking plating, leaving behind unsolderable surfaces
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/efd/resource-center/solder-selection-guide
Monel Nichrome Nickel Nickel Iron / Alloy42 Nickel Silver Palladium Platinum Silver Solder Plated Stainless Steel Tin Titanium Non-solderable Zinc Key Recommended Alloy Specific (contact EFD
