(1) Optimize the coating formula to increase the ratio of hot melt and water-soluble components, and improve the heat dissipation performance of the coating; reduce the overall average molecular weight of the resin, improve the coating performance and drilling chip removal performance; import domestic raw materials to replace imported materials to reduce cost.
(2) Control of film quality and design of process parameters. Adjustment and control of composite resin glue/coating process parameters: including mixing, curing, fractional filtration, baking temperature/time, wind frequency, line speed, tension, etc. . The improvement of film production equipment, including production line structure, gluing method, rubber basin design, aluminum foil cleaning and degreasing device, baking line form, roller gap, cooling device, etc. Optimization of the influence of thickener on the viscosity of glue
(3) Optimization and control of the performance and quality of the coated aluminum PCB entry sheet. Control and analysis of the surface flatness, roughness and hardness of the coated aluminum PCB entry sheet. Control and analysis of the heat absorption, lubrication and water solubility properties of the coated aluminum sheet. The influence on the drilling performance, the control of the number of laminated aluminum sheets, the control of the influence on the quality of the drilling
(4) Stable appearance quality With the optimization of the performance of the cover plate, the change of material suppliers, and the adjustment of production process parameters, the appearance of the product is easily affected and changed. Broaden the scope of application of formulas and process parameters, and stabilize formulas and process parameters. Adjuvants are used to mix and match a variety of functional additives such as leveling, defoaming, dilution, and promotion. Optimize the quality of the film and regulate the appearance of the product. 2. Main technical performance indicators
● Good coating effect: the sample surface is evenly coated, without cracks, shrinkage holes, bubbles, etc., and has good adhesion to the aluminum foil;
● The hole diameter is small: 0.1～0.25mm;
● The hole position accuracy is high: Hard board 2.2～3.5, soft board 5.1～5.8;
● Good quality of the hole wall: the roughness of the hole wall is reduced from the traditional 25～15 μm to 15～8 μm
● Low broken needle rate: <0.003%;
● Increase in stacking: the number of layers of the same PCB stack in a single process is increased, the stack of soft boards is increased from the traditional 7-8 layers to 10-11 layers, and the drilling efficiency is increased by more than 30%, which greatly reduces the customer's production cost.
●Storage resistance: It can be stored for 6 months under the environment of 25℃ and 60%.
●Good environmental protection: The composite resin layer on the surface of the color coated aluminum PCB entry sheet does not contain heavy metals, and the ingredients are completely water-soluble, which is environmentally friendly and pollution-free.
