Double sided aluminum substrate

Introduction of double sided aluminum substrate
Double sided aluminum substrate is a unique metal copper clad laminate. It has good thermal conductivity, electrical insulation and machining performance. Heat diffusion is treated very effectively in the circuit design scheme, which can reduce the product operating temperature, improve the product power density and reliability, prolong the product service life, reduce the product volume, and reduce the hardware and assembly cost. It is mainly used in electronic, communication, power supply, automobile, motor and other industrial fields.
 
Process flow of double sided aluminum substrate
(1) Control of the first aluminum plate drilling.
When drilling, 1 PNL / stack is used, phenolic backing plate, rotating speed and cutting speed are used, which are reduced by 30% on the basis of conventional drilling parameters; The drilling hole diameter of aluminum plate shall be 0.5 mm ~ 1 mm larger than the actual hole diameter.
(2) Double sided aluminum base conduction insulation technology.
Process: aluminum plate drilling (the hole diameter is pre increased by 0.5 mm ~ 1 mm) → resin plug → compression → second drilling → conventional double-sided plate process; The aluminum plate shall be pressed on one side to ensure that the plug hole is full and free of bubbles.
(3) Expansion and contraction control after aluminum plate pressing.
Measure the expansion and contraction of aluminum plate with three-dimensional element; When stretching the drilling belt for the second drilling according to the expansion and contraction ratio, it is concentric with the first aluminum plate drilling.
(4) Control of profile drape.
CNC speed and cutting speed are reduced by 30% on the original basis and cooled by spraying alcohol; It is produced with special milling cutter for aluminum substrate, with a service life of 20000 ~ 30000.
 
Advantage of double sided aluminum substrate
1. Make with mark50 drilling rig: rotate speed S150, lower knife F30, lift knife u600, stack plate 1 / stack, reduce hole deviation, and complete the production with phenolic backing plate. The drill bit is a brand-new double-edged cutter with a hole limit of 500 holes. After drilling, the hole diameter shall be controlled within the tolerance range of 0.10 mm ± 0.05 mm; After drilling, the diameter of the hole is 84.5mm without burr and sharp edge.
2. The pressing and filling holes are produced by outward delivery, and the plumpness of the pressing resin filling holes is ≥ 95%.
3. The molding is made by a large number of molding machines, with cutting speed of 0.8 m / min, returning speed of 1.0 m / min, rotating speed of 39 Kr / min and number of laminated plates of 1 piece / stack. The cooling mode during production is manual alcohol sprinkling. After forming, the tolerance is within ± 0.1mm, the plate edge is smooth without burr, and the quality is good.