We manufacture and export Brass Neutral Links 12 Holes from High-Grade Free Cutting Brass, Brass - BS 2872 CZ 112, Brass CDA-360 or any special composition material. They are available with various features such as Not Exposed to Atmosphere, High Pol
Although emulsion screens are one of the oldest forms of printing, they remain the most versatile to this day. Emulsion screens are made from a frame. Mesh is stretched onto this frame, and the mesh is then imaged ready for printing. There are many
Electronics Forum | Thu Jul 24 13:12:41 EDT 2008 | dphilbrick
I seriously doubt it. It is extremely thin and the gold's only real purpose in life is protect the nickel underneath from oxidizing. Once you wear that very thin gold off you will have exposed, oxidized, nickel and loss of conductivity.
Electronics Forum | Thu Sep 19 21:23:42 EDT 2002 | davef
I'm not saying that an eraser will necessarily work. What I'm saying is that some erasers may cause more trouble than the eliminate. Look here http://aic.stanford.edu/jaic/articles/jaic28-02-003_2.html We prefer a brand called Ruby Red. The "ole
Industry News | 2018-12-08 03:29:29.0
SMT Dictionary – Surface Mount Technology Acronym and Abbreviation
Industry News | 2018-11-27 14:03:14.0
Super PCB is pleased to announce that it offers a variety of quality PCB surface finishes. PCB surface finish is the coating between the PCB and components that provides a solderable surface for components and protects the exposed copper circuitry.
Technical Library | 2014-06-23 14:50:52.0
It was unusual to see chip terminations change colors when tin lead solders were used but with the introduction of lead free reflow soldering and the corresponding increases in reflow temperatures terminations are now changing colors. Two conditions are present when reflow temperatures are increased for lead free solder alloys that leads to discoloration. Reflow temperatures are above the melting point of tin (Sn MP is 232oC). Air temperatures commonly used in forced convection reflow systems are high enough to both melt the tin plating on the termination allowing it to be pulled into the solder joint due to solder joint liquid solder surface tension leaving behind the exposed nickel barrier. Now those metal oxide colors will be visible due to high air temperatures during reflow.
Technical Library | 2021-11-03 17:05:39.0
Additively printed circuits provide advantages in reduced waste, rapid prototyping, and versatile flexible substrate choices relative to conventional circuit printing. Copper (Cu) based inks along with intense pulsed light (IPL) sintering can be used in additive circuit printing. However, IPL sintered Cu typically suffer from poor solderability due to high roughness and porosity. To address this, hybrid Cu ink which consists of Cu precursor/nanoparticle was formulated to seed Cu species and fill voids in the sintered structure. Nickel (Ni) electroplating was utilized to further improve surface solderability. Simulations were performed at various electroplating conditions and Cu cathode surface roughness using the multi-physics finite element method. By utilizing a mask during IPL sintering, conductivity was induced in exposed regions; this was utilized to achieve selective Ni-electroplating. Surface morphology and cross section analysis of the electrodes were observed through scanning electron microscopy and a 3D optical profilometer. Energy dispersive X-ray spectroscopy analysis was conducted to investigate changes in surface compositions. ASTM D3359 adhesion testing was performed to examine the adhesion between the electrode and substrate. Solder-electrode shear tests were investigated with a tensile tester to observe the shear strength between solder and electrodes. By utilizing Cu precursors and novel multifaceted approach of IPL sintering, a robust and solderable Ni electroplated conductive Cu printed electrode was achieved.
| https://www.eptac.com/blog/leaded-vs-lead-free-solder-which-is-better
. Lead-free solders typically contain a variety of different metals. Some of the components you may find in lead-free solder include tin, copper, silver, nickel and zinc
Surface Mount Technology Association (SMTA) | https://www.smta.org/icsr/speaker_forms/Paper-Format-Requirements.doc
. However, until such time that ImAg is proven to not creep corrode, Dell will not employ this surface finish for critical business products that may be exposed to such harsh environments
