10-Watt-UV-Lasermodul (355 nm) zur Kennzeichnung von Bipolartransistoren mit isoliertem Gate

IGBT, der vollständige Name von Insulated Gate Bipolar Transistor, bedeutet wörtlich übersetzt „Insulated Gate Bipolar Transistor“. Laut Daten kann die Stehspannung von IGBT mehr als 6500 V erreichen, und der Durchgangsstrom kann Tausende von Ampere erreichen, und IGBT wird als Frequenzumwandlungsmodul verwendet, und die Frequenzumwandlung kann Zehntausende Male pro Sekunde erreichen.

Thanks to this, IGBT is commonly known as the "CPU" of power electronic devices. It is widely used in rail transit, smart grid, aerospace, electric vehicles, and new energy equipment. It is the core device for energy conversion and transmission, such as used on high-speed rail. The inverter circuit of the new energy electric vehicle Tesla is composed of IGBTs. The battery output of the new energy electric vehicle Tesla is DC, but the motor is AC. At this time, there are IGBT devices at the hub of converting from DC to AC.

Today, IGBT has become an indispensable and important component of photovoltaic and automotive electronics circuits. In order to clarify product-related parameters, manufacturers generally mark product numbers, circuit diagrams, etc. on certain areas of the IGBT. Conventionally, they are marked by labeling or spraying codes. With the expansion of laser marking applications, marking on the surface of the IGBT has also gained Wide application, which is mainly due to the following aspects:

The first is that the marking obtained by laser marking is permanent, does not fall off, does not blur, is resistant to wear and scratches, and can maintain the shape of the mark for a long time, which is of great significance for anti-counterfeiting and traceability; secondly, the marking line of laser marking The width can be on the order of microns, and the markers can be marked with high quality in the tiny area of the IGBT, even barcodes and two-dimensional codes are not a problem; moreover, laser marking makes full use of the flexibility of the computer for graphics and paths Automatic control, high marking efficiency, high consistency of markers, editable, no other consumables, no molds, good subjective initiative; finally, laser marking is non-contact processing, no external force is applied to IGBT, and it is not easy to damage the device, ensuring performance Reliable and stable.

The 355nm UV nanosecond laser has excellent performance in plastic materials, and more and more customers choose it. It has the characteristics of narrow pulse width (about 25ns), fast speed, high precision, high peak value, and easy absorption of materials. It is also called "cold" processing method and can perform marking, cutting, drilling, etching and other processes. Moreover, its beam quality is high (M2<1.2), easy to focus, and the output spot diameter is small, which is one of the key parameters to achieve micron-level line width marking, which is as thin as a hair.

More importantly, the single photon energy of 355nm ultraviolet laser is high, which can destroy the molecular bonds of some materials, so that the materials can be quickly vaporized and evaporated from the surface layer. This is a photochemical reaction. The sensitive plastic material is friendly, and it is not easy to cause scorching, carbonization, melting, etc., which will affect the clarity and appearance of the mark.

Nowadays, many production companies have integrated 355nm ultraviolet lasers on the assembly line for laser marking. The use of laser marking machines not only solves the limitations and singleness of coding or labeling, but also improves the quality of products with fine marking. The high stability undoubtedly improves the brand quality among downstream customers, and enhances the competitiveness of products in the fierce market from the side.