LDI exposure

LDI exposure machine is a machine equipment used for manufacturing printed circuit boards. LDI is the abbreviation for "laser direct imaging" in English. This machine uses laser technology to provide high-precision exposure to the circuit board in a short period of time, thereby achieving accurate transfer of CAD images to the circuit board.

LDI uses lasers to directly scan images of printed circuit boards onto photosensitive dry films. Due to the need for no photographic film, size deviation caused by the use of film expansion and contraction, as well as deviation caused by non parallel exposure lines, is avoided. At the same time, it can provide high flexibility and precision, including being able to meet the needs of mass production of any imaging, complex images, high yield, automatic control, and traceability. It has gradually become a mainstream technology, widely used in HDI boards, IC carrier boards, etc.

The LDI exposure machine has a unique optical system and high-power laser light source, which can achieve complex image transfer by controlling the amplitude, frequency, and phase of the laser beam. In addition, the LDI exposure machine also has excellent automatic alignment function and high-speed scanning system, which can complete image transfer in an extremely short time. Compared to traditional lithography machines, LDI exposure machines have higher accuracy and lower manufacturing costs.

LDI exposure machines typically use a UV laser source, with a minimum wavelength of 193nm. It can be directly used on printed circuit boards, avoiding the process of using liquid fluorescent ink in traditional printed circuit boards and shortening the time of pattern transmission. The image quality, clarity, and accuracy of LDI exposure are high, resulting in significant production efficiency.

Compared to traditional CCD, LDI has many advantages:

1. Direct imaging without the need for film reduces film production costs and shortens sample delivery time

2. Reduced film production and alignment errors, resulting in more accurate circuit exposure.

3. Low energy consumption enables automated operations, saves labor costs, improves product quality, and avoids the occurrence of defects.

4.Under the same output, LDI occupies a smaller area than traditional exposure machines, which can greatly improve the effective utilization of space in a clean room.

At present, the factors that affect the exposure speed of LDI include: data storage and transmission, laser energy, switching speed, production speed of polygonal shapes, sensitivity of photoresist, laser head movement speed, etc

Technology is the primary productive force. Sihui Fuji keeps up with the forefront of the times and puts advanced equipment into production lines. At present, our company has purchased 18 LDI exposure machines for printed circuit board manufacturing. We believe that with the support of advanced equipment, we will achieve better results in the quality of printed circuit boards.