Conductive epoxy is a strong adhesive used in the electronics industry, made conductive by materials like silver or nickel. Epoxy Technology, Inc. was the first to supply it in 1966. Conductive silver epoxy is particularly strong and useful for metal joining and circuit board repair. It can also bond standard building materials. Curing time is important, and most epoxies come in two tubes or pre-weighed envelopes. It can be purchased online.
Conductive epoxy is a resin used to coat and bond electrical parts. It is a strong structural adhesive used in the electronics industry. What makes this epoxy conductive are the materials used to synthesize it, such as silver or nickel.
In 1966, Epoxy Technology, Inc. became the first company to supply conductive epoxy resin to the manufacturing industry. The company intended to use the product as a die-attach adhesive for nanoelectronics and semiconductor assembly and packaging, and it is still used for these purposes today. Frank W. Kulesza, the president of Epoxy Technology, was the first to propose the original design.
A particularly adhesive and electrically conductive type of epoxy is conductive silver epoxy. When used as an engineering adhesive, it is effective in repairing defects in metal designs and making circuit board jumpers. Conductive silver epoxy is very tensile strength, able to withstand 911 pounds per square inch (63.77 kilograms per square centimeter). It can withstand a compressive pressure of 1,100 pounds per square inch (77 kilograms per square centimeter) before rupture. Most importantly, it has very low electrical resistance, resulting in a volume resistivity at 25° Celsius (77° Fahrenheit) of 0.38 ohm-centimetres.
Epoxy application involves using this powerful adhesive to bond not only metals such as bronze, brass, copper, steel and aluminum, but also standard building materials such as wood, paper, plastic, fiber, rubber and glass. Metal joining is especially important in the high-tech and electrical manufacturing industries. Adhering paper, plastic, and the like to a surface is typically used in industries that would otherwise employ traditional welding methods, such as woodworking and home construction.
Curing time, or the time it takes for conductive epoxy to be fully operational, is an important property of this material. A standard curing time for air, assuming the surrounding environment is 24° Celsius (75° Fahrenheit), is five hours. Typically, the instructions that come with the material encourage the user to heat the epoxy before applying. The heat cure time varies according to the temperature applied, but is usually between 15 and 15 minutes.
Most conductive epoxies are available as a set of two 7 gram tubes. They can also come in pre-weighed, sealed envelopes that are easily mailed. Many online shopping portals offer these epoxies. Also, epoxy resin can be bought online from one of the famous epoxy resin companies.
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