Millimeter-wave (mmWave) radar technology has emerged as an accurate and cost-effective approach to motion sensing and control. Resin Designs’ TechFilm B-Stage Epoxies (electrically conductive and structural) have been enhancing the performance of these devices. With their precise bond line thickness and placement accuracy, the B-stage epoxy films play critical roll in ground plane formation and adhesion of patch antenna to power boards. The technology has been front and center in the automotive arena from basic safety innovations like back up and side sensing devices to full autonomous driving development. As mmWave devices increase in number within an automobile, a number of key factors are driving development including:
Cationic and free radical are the two most popular mechanisms for UV adhesives. Approximately 93% of the UV market is in free-radical chemistry while cationic has about 7%. Although a minority of the market, cationic adhesives provide strategic advantages over traditional free-radical acrylate chemistries. These advantages are detailed below.
B-stage epoxy films for clean reliable bonding/thermal and electrical conductivity
Most of us are familiar with epoxy adhesives and coatings, especially those of us within the electronics and medical device industries. We have all seen and often used two-component liquid epoxies. They are provided in syringes or pails for dispensing as adhesives, sealants, gaskets, and coatings. There is, however, a lesser known relative that can be cleaner, more consistent, environmentally friendly, and capable of unique properties such as thermal and electrical conductivity. It is known as B-stage epoxy film.