In recent years, with the advancement of VLSI and miniaturization of electronic components and high integration, multi-layer boards are moving in the direction of high-performance circuits, which is why there is a growing demand for high-density lines and high wiring capacity. The requirements for electrical characteristics (such as Crosstalk, integration of impedance characteristics) are more stringent. The popularity of multi-legged parts and surface-mount components (SMD) makes the circuit board pattern more complex, the conductor lines and apertures are smaller, and the development of high-layer boards (10-15 layers) is popular. . In the latter half of the 1980s, thin-layer multi-layer boards with a thickness of 0.4 to 0.6 mm were gradually popularized for high-density wiring and small holes in line with small and lightweight requirements. The hole guide and shape of the part are completed by punching. In addition, some of the products produced in small quantities and diversely use a photoreceptor to form a pattern. High-power amplifier - Substrate: ceramic + FR-4 plate + copper base, number of layers: 4 layers + copper base, surface treatment: immersion gold, features: ceramic + FR-4 sheet mixed lamination, with copper-based pressure knot. Military high-frequency multi-layer board - Substrate: PTFE, thickness: 3.85mm, number of layers: 4 layers, features: blind buried holes, silver paste hole filling. Green product - Substrate: Environmentally friendly FR-4 sheet, thickness: 0.8mm, number of layers: 4 layers, size: 50mm × 203mm, line width / line spacing: 0.8mm, aperture: 0.3mm, surface treatment: immersion gold, Shen Xi. High-frequency, high-Tg device - Substrate: BT, number of layers: 4 layers, thickness: 1.0mm, surface treatment: gold. Embedded System - Substrate: FR-4, number of layers: 8 layers, thickness: 1.6mm, surface treatment: spray tin, line width / line spacing: 4mils / 4mils, solder resist color: yellow. DCDC, power module - Substrate: high Tg thick copper foil, FR-4 sheet, size: 58mm × 60mm, line width / line spacing: 0.15mm, aperture: 0.15mm, thickness: 1.6mm, number of layers: 10 layers , Surface treatment: immersion gold, features: each layer of copper foil thickness 3OZ (105um), blind buried hole technology, high current output. High-frequency multilayer board - Substrate: ceramic, number of layers: 6 layers, thickness: 3.5mm, surface treatment: immersion gold, features: buried holes. Photoelectric conversion module - Substrate: ceramic + FR-4, size: 15mm × 47mm, line width / line spacing: 0.3mm, aperture: 0.25mm, number of layers: 6 layers, thickness: 1.0mm, surface treatment: gold plating + Gold finger, features: embedded positioning. Backsheet - Substrate: FR-4, number of layers: 20 layers, thickness: 6.0mm, outer copper thickness: 1/1 ounce (OZ), surface treatment: immersion gold. Micro module - Substrate: FR-4, number of layers: 4 layers, thickness: 0.6mm, surface treatment: immersion gold, line width / line spacing: 4mils / 4mils, features: blind holes, semi-conductive holes. Communication Base Station - Substrate: FR-4, number of layers: 8 layers, thickness: 2.0mm, surface treatment: spray tin, line width / line spacing: 4mils / 4mils, features: dark solder mask, multi-BGA impedance control. Data Collector - Substrate: FR-4, number of layers: 8 layers, thickness: 1.6mm, surface treatment: immersion gold, line width / line spacing: 3mils / 3mils, solder mask color: green matte, features: BGA Impedance control. Vehicle Application Smart Glass Ultraviolet rays not only have great damage to the skin, but also hurt your car, causing aging and cracking of the interior. Automotive dimming film on uv insulation rate up to 100%, completely do not worry about hot weather driving sunburn. Liquid crystal is a phase state and a polymer material, which has been widely used in thin and light display technology since the middle of the 20th century due to its special physical, chemical and optical properties. Liquid crystal phases can only appear when molecules with special shapes are combined that can flow, have crystalline optical properties, and are visually perceived at different angles. Their special optical properties and sensitivity to electromagnetic fields make them practical. Among the above three dimming glass schemes, PDLC scheme emerged the earliest and the most advanced and mature technology. The vast majority of domestic dimming glass manufacturers are commercial this scheme. The other two solutions have more limited applications and higher prices, and few domestic companies produce them. Vehicle Application Smart Glass,Car Window Glass,Smart Tint Auto Film,Dimming Glass for Vehicles,Car Privacy Glass,Car Window Tint Film Tianqixun Technology , https://www.tqxdisplay.com