Background technology
From the technology of present board production, there are waste water, waste liquid and exhaust gas discharging, and the leftover pieces in the production process, waste material and underproof product, the environment and the ecological balance are caused quite serious destruction, or even permanent harm.The circuit board manufacturing of various base materials need have certain thickness Copper Foil, and utilize acid and alkali corrosion to become circuit on the plate base.Most of Copper Foil does not utilize, and utilance is extremely low, even is lower than 5%.Waste the copper resource greatly.
" a kind of PCB circuit board making new technology " do not had waste water, waste liquid and exhaust gas discharging fully.Having substituted the production of metallic circuit plate substrate and the sintering process of ceramic wiring board with the printing insulating material, with electric conducting material Alloy instead of Copper etching method, is a kind of bonding addition technology.Fundamentally reached the target that the circuit board greenization is produced.
" a kind of PCB circuit board making new technology " fully phased out the production of board substrate.
Summary of the invention:
Traditional PCB process for manufacturing circuit board:
Substrate blanking → boring → heavy copper → full plate copper facing → figure transfer printing ink or dry film → graphic plating → etching → half inspection → silk-screen welding resistance printing ink and legend ink or paste dry film solder mask → hot air leveling or spray tin → profile → become inspection → electrical testing → packing
A kind of PCB circuit board making new technological flow:
Substrate blanking → boring → insulation processing → bonding circuit → silk-screen welding resistance printing ink → one-tenth inspection → electrical testing → packing
" a kind of PCB circuit board making new technology " adopts the addition method.Comprise technologies (non-etching) such as conductive layer injection, electroless copper, chemical plating stannum, trace bonding.
Circuit forms embodiment:
The operation of metal substrate:
One, insulating barrier is handled
1, with the insulating heat-conduction material silk screen printing on metal substrate, put into the baking oven semi-solid preparation, 120 ℃-140 ℃ of temperature, the time is no more than 15 minutes.
2, put into 145 ℃ of 15 minutes temperature of hot press pressing.
Two, bonding circuit
1, with the silk screen printing of circuit primer on insulating barrier, again composite conductive powder is printed on above the primer 140 ℃ of put into baking oven 5 minutes, temperature.
2, put into press 15 minutes, temperature are 145 ℃.
Aluminium base, copper base, iron substrate are fit to this maneuver.
The non-metal base operation:
One, bonding circuit
1, with the silk screen printing of circuit primer on substrate, again composite conductive powder is printed on above the primer 140 ℃ of put into baking oven 5 minutes, temperature.
2, put into press 15 minutes, temperature are 145 ℃.
Non-metal board bases such as ceramic wafer, epoxy resin board, phenolic board, soft base plate, paper substrate plate are fit to this maneuver.Multi-layer sheet is taked same manufacture craft.
Compare with traditional handicraft, this technology possesses following characteristics:
1) technological process is short: be equivalent to 1/2 of traditional handicraft and be convenient to management, thereby improved production efficiency greatly.
2) manufacturing process environmental protection: removed the electrochemical treatments in the traditional handicraft, Acidity of Aikalinity etch process, alkaline solder mask imaging process, thereby realized the manufacturing process greenization.
3) energy-conservation joint depletion equipment: flow process is lacked, is good at management, reduces bigger equipment cost and management cost, has removed high-temperature sintering apparatus from as ceramic circuit board.Can save annual 1000000 tons of copper foil plate.
That [0028] 4) has exempted all base materials covers copper production technology.
Fig. 1 is present PCB circuit board making flow chart;
Fig. 2 is a kind of PCB circuit board making new technological flow figure;
Fig. 3 is a kind of board structure of circuit schematic diagram of PCB circuit board making new technology.