Firstly, how fast is the throughput? Secondly, is the process fully automated or manual? How will you dispense the adhesive? two component mix and then room temperature cure, or heat cure – if the application involves temperature-sensitive components, is a heat cure suitable? How quickly does the adhesive need to cure? Curing mechanism and cure speed – how do you plan to cure the adhesive e.g.And then there is the filler particle size – what is acceptable or necessary?.Whether it needs to flow well or stand as a proud drop (with high “wet” strength). Also, the viscosity and rheology of the adhesive. ![]() To begin with, the level of electrical conductivity (or volume resistivity).There are some vital points to consider when selecting an electrically conductive adhesive: Selecting an Electrically Conductive Adhesive Solar cells also use adhesives instead of solder as there is less warpage and damage to the sensitive wafers that make up solar cells. When using electrically conductive adhesive for an entire electrical assembly, it negates the requirement to undergo a solder re-flow process.Īpplications for electrically conductive adhesives aren’t just limited to bonding components onto PCBs or die attach they can be very useful for other electronic applications where substrates are temperature sensitive – such as for touch-panels, LCD displays, coating and bonding RFID chips, and mounting LEDs. PCBs with components attached to both sides can also benefit from using an electrically conductive adhesive as the assembly process is easier without the risk of components dropping off the underside when parts are soldered on the top. This type of application calls for an electrically conductive adhesive that can be used instead of solder. ![]() Because in many cases (particularly when using an anaerobic or cyanoacrylate adhesive) there is no glue line control and effectively parts are touching (with adhesives filling in microscopic crevices), some electrical charge can still be transferred as there is enough metal to metal contact still occurring.Ĭertain temperature-sensitive electronic components cannot be soldered because the intense heat of liquid solder and the soldering iron can cause damage to the component. ![]() In addition, some offer improved thermal conductivity to help with thermal management of electronic components and heat sinks, directing heat away from sensitive components. Electrically conductive adhesive products are primarily used for electronics applications where components must be held in place, and electrical current can be passed between them.ĭepending on the gap between components, most general adhesives (such as anaerobics, cyanoacrylates, epoxies, and acrylic-based adhesives) act as an electrical insulator.
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