The substrate nature and desired layer composition determine the most optimal pvd ‘physical vapour deposition’ technology or Multi Arc Ion Coating Equipment mixture of technologies; thermal, OLED or electron beam evaporation, various (magnetron) sputter applied sciences or (pe)cvd ‘(plasma enhanced) chemical vapour deposition’. Relying on the demands, the person can be in a position to completely management the temperature of the substrates; both heating or cooling. Pattern stage choices; plain disc pattern platen, table, calottes or planetary stages.
Conformal coatings are gaining growing acceptance in manufacturing business. They’re specifically formulated lacquers designed to guard printed circuit boards (PCBs) and related tools from their environment. This improves and extends their working life and ensures security and reliability of performance. These coatings conform to the contours of the board and its elements creating a skinny layer which is both lightweight and flexible. They protect circuitry from hazards corresponding to chemicals (e.g. fuels, coolants and so on.), vibration, moisture, salt spray, humidity and extremes of temperature this may prevent corrosion, mould progress and current leakage which may otherwise lead to board failure with an uncoated PCB.
– Use graphite foil between boat and electrode. This is used for 2 purposes. Firstly, adjustment of tightness and secondly, relive the thermal stress due to the totally different CTE for uniform contact.
– Keep correct contact between evaporation boat and electrode, so as to make sure good electrical contact. If it is just too free, it should cause current instability at each ends of boat. In consequence it may cause an electrical spark. Additionally, boat won’t have sufficient power resulting in evaporation boat temperature is simply too low and spreading liquid aluminum which cannot evaporate. If it is just too tight, when the evaporation boat is heated, thermal growth is not going to straightforward and it is going to be difficult to release thermal stress. Because of this this may occasionally deform the boat and even cause the boat crack and fracture.
– Every time before set up of a brand new boat, rigorously clean up the 2 copper electrodes. Also, the aluminum and graphite tape have to be completely cleaned.
– Make sure of the boat alignment and there ought to be no hole between boat and electrode (Fig.3), otherwise the boat will distort throughout heating. This can result in poor contact inflicting spark and boat cracking.
The second rule of troubleshooting is to have histories out there. Keep information on pumpdown occasions, cleansing schedules, oil adjustments, number of rejected parts, weather, substrate lot, or any variable you may consider which impacts your metallizing operation. The explanation for this is straightforward. If you begin making unhealthy components, you’ll want to know what you are doing in another way than you had been doing earlier than. The extra data you’ve about your operation, the simpler it will be to pinpoint potential causes. Notice that this data comes at a price. It takes time and effort and due to this fact money to gather this information. But gathering info regularly quickly becomes a habit and is nearly all the time cheaper than attempting to make up for the lack of it.