镀膜设备讨论 - 催化 - 仪器药品 - 第2页小木虫论坛-学术科研互动平台

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ElectroWang

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gh different engineers count things differently, there are four distinct stages to the spin coating process.

Deposition of the coating fluid onto the wafer or substrate
This can be done by using a nozzle and pouring the coating solution or by spraying it onto the surface. A substantial excess of coating solution is usually applied compared to the amount that is required.

The substrate is accelerated up to its final, desired, rotation speed
The substrate is spinning at a constant rate and fluid viscous forces dominate the fluid thinning behavior
The substrate is spinning at a constant rate and solvent evaporation dominates the coating thinning behavior

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11楼2008-04-15 12:19:49

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ElectroWang

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Dip coating refers to the immersing of a substrate into a tank containing coating material, removing the piece from the tank, and allowing it to drain. The coated piece can then be dried by force-drying or baking. It is a popular way of creating thin film coated materials along with the spin coating procedure.

Stages of dip coating
The dip coating process can be, generally, separated into three stages:

Immersion: the substrate is immersed in the solution of the coating material at a constant speed preferably judder free.
Dwell time: the substrate remains fully immersed and motionless to allow for the coating material to apply itself to the substrate
Withdrawal: the substrate is withdrawn, again at a constant speed to avoid any judders. The faster the substrate is withdrawn from the tank the thicker the coating material that will be applied to the board.

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12楼2008-04-15 12:20:15

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