Cutting of Insulated Metal Substrates

LPKF has developed a special solution for depaneling and IMS processing that involves cutting of the printed circuit boards by a powerful laser.

The laser brings with it several advantages and is thus more than just an economically attractive alternative to mechanical depaneling processes.

With this solution, printed circuit boards with aluminum, copper, or stainless steel metal cores are cut and depaneled in a specially developed LPKF laser process. The laser source works with process parameters that have been optimized for the specific application. Due to the noncontact nature of the process, no mechanical stresses are induced in the material. The board and the components retain their stability and quality because the material in the vicinity of the cut is minimally affected by the process.

Due to the sensitive applications in which the technically challenging IMS circuit boards are used, the demands on the cutting quality are high. The laser impresses here, too: deposition of metal chips on the material is precluded by the process. It can, however, occur with milling and other mechanical machining methods and can trigger short circuits. Thanks to the LPKF laser technology, this danger is avoided. The reliability of the laser-cut printed circuit boards is just as high as before the cutting process.

Due to the high volumes used in the respective printed circuit board applications, the process speed is an important factor in production. To take this into account, the laser systems from LPKF allow very high effective cutting speeds, which vary depending on the desired cut quality as well as the printed circuit board material thickness and material composition.

Insulated Metal Substrates, also known as metal core printed circuit boards, can be found in a multitude of applications with strict heat dissipation requirements. Foremost among them are power electronics applications. Measuring transducers, transistor arrays, and motor drivers can all be equipped with IMS. Other important applications can be found in the automotive/transport sector, where those substrates are used in headlights/lights, GPS, and power modules. IMS are also indispensable in today’s communications and consumer electronics, for example, in power amplifiers, transmitters, microstrip circuits, motor and voltage regulators, amplifiers, and equalizers.

Compared with conventional printed circuit boards – made of FR4, for example – Insulated Metal Substrates offer a range of advantages for the above-mentioned applications: high thermal conductivity, savings resulting from the reduction in material thickness and the lowered need for heat sinks, and a reduced operating temperature.

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