Simple and uncomplicated, remove the back and stick it on the chip. I bought them to work with the 7400 series ICs so they are a bit large but so far my infrared thermometer shows the ICs running at least 4-5 degrees cooler than they were (measured at the feet of the unit , which are the main source of). Warmth). shell method on the ones I've adapted it to). It's worth it, hopefully it will extend the life of some hard-to-reach parts.