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Spin Coating Unit

Larger version

Model: HO-TH-05LS

Holmarc’s Spin Coater, Model: HO-TH-05LS, is a dedicated tabletop system to spin coat substrates up to 150 mm (6 inch) diameter, with well controlled spin process parameters in a research laboratory. The high speed and duration range allow the user to achieve the desired thickness or thinness of the film. The spin head actuator is a precision DC servo motor, which is maintenance free, with accurate speed and acceleration control. A vacuum chuck powered by oil-less vacuum pump holds the substrate at the spinning head.

The device has user friendly front panel having keyboard and LCD for programming the spin process. Spin duration, spin speed, acceleration, etc. are all programmable parameters through the front panel. As the program memory is non-volatile, the recorded parameters are not lost in case of any power failure. This model is equipped with a memory of 9 pre-set, editable programs, each having 9 steps.

The device is compact and complete with electronics built into the unit within a footprint of 600 x 400 mm, excluding the vacuum pump. All components in the device are corrosion protected to make it clean room compatible. The spin chamber is constructed in nylon with an internal diameter of 245 mm. A transparent protective covering on top of the chamber makes spin coating a hassle free experience. Three sets of PTFE anti-corrosive vacuum chucks are provided along with the equipment for holding substrate from 15 x 15 mm square to 150 x 150 mm square. Solvent drainage and vacuum release facilities are also provided in this device. Holmarc can provide customized models as per requirement.


    Chuck diameters : 15mm, 25 mm, 50 mm, 75mm & 100 mm

    Transparent Safety Lid over the Working Chamber

    Non-volatile Program Memory

    User friendly design

    Inlet and outlet for Inert Gas Purging, 6mm tubing

    User Interface :     20 x 4 line LCD
    Actuator :     Brushless DC servo motor
    Program Memory :     9 programs (non - volatile)
    Speed Profile :     Speed, Duration and Acceleration
    Spin Speed :     60 - 8000 RPM
    Speed Resolution :     1 RPM
    Speed Accuracy :     +/- 1 %
    Acceleration / Deceleration :     5 - 2000 rpm / s (Depending on the chuck size)
    Duration :     1 - 99 sec / min / hour for each step
    Sample Chucks :     5 Nos. (15 mm, 25 mm, 50 mm, 75mm & 100 mm)
    Maximum Sample Diameter :     150 mm
    Minimum Sample Diameter :     15 mm
    Bowl Material :     Polypropylene (PP)
    Lid with transparent window and sample dispensing port
    Safety interlock to prevent spinning when the bowl is open
    Sample Holder :     PTFE disk with silicon rubber O ring
    Sample Mounting :     Secured by vacuum holding
    Vacuum Connector :     8 mm dia Snap-in hose connector
    Solvent drainage and vacuum release facilities
    Nitrogen / Inert Gas Inlet
    Vacuum pump On / Off and Release Switches
    Power Input (Factory set) :     230V/50Hz or 110V/50Hz
    Maximum Power Consumption :     350W (With vacuum pump)
    Dimensions :     537 x 573 x 425 mm (W x D x H)

    Spincoating is ubiquitous in organic electronics, nanotechnology, semiconductor industries and other Industrial sectors.

    Spin coating is widely used in microfabrication of functional oxide layers on glass or single crystal substrates using sol-gel precursors, where it can be used to create uniform thin films with Nano scale thicknesses. It is used intensively in photolithography, to deposit layers of photoresist about 1 micrometer thick.

Optional Accessories

    Digital Pipette for dispensing of liquid into the substrate

    Stand is used for holding manual pipette

    Vacuum adaptor to fix Petri dishes of sizes ranging from 30 mm - 100 mm diameter

    Mechanical clips or locks to hold samples without vacuum

Spin coating is one of the most common techniques used to deposit uniform thin films to flat substrates. It is used in a wide variety of industries and technology sectors. The advantage of spin coating is its ability to quickly and easily produce very uniform films, ranging from a few nanometers to a few microns in thickness.

In this technique, a small amount of coating material is applied on the center of the substrate, which is either spinning at low speed or not spinning at all. The substrate is then rotated at high speed in order to spread the coating material by centrifugal force. Rotation is continued while the fluid spins off the edges of the substrate, until the desired thickness of the film is achieved. The applied solvent is usually volatile, and simultaneously evaporates. So, the higher the angular speed of spinning, the thinner the film. The thickness of the film also depends on the viscosity and concentration of the solution and the solvent.

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