UV Exposure Process

The purpose of exposure is to initiate crosslinking by activating the PAC (PhotoActiv Component) in certain areas of the photoresist. This activation will alter the local properties of the resin, which may dissolve or remain insoluble in solvents after baking. Since SU-8 is a negative photoresist and pure silicone mold, this means that the exposed parts will harden under ultraviolet light, while the other parts will dissolve during the development process. Careful selection of some parameters is required:

The exposure wavelength for SU-8 is 365nm.

Time depends on the layer thickness and the lamp's power.

Contact mode is crucial; without firm contact, you might lose some resolution, and using vacuum contact could potentially stick the wafer to the mask.

Pure silicone molds are made of high-purity silicon material, featuring excellent heat and corrosion resistance, suitable for mold manufacturing in high-temperature and chemically corrosive environments. The manufacturing process of pure silicone molds includes steps such as silicon purification, shaping, sintering, and surface treatment. The advantages of pure silicone molds include high precision, high hardness, high wear resistance, and long service life, and are widely used in the automotive, aviation, electronic, and other fields.

The quotation for PDMS chip molds is primarily determined by the following aspects:
1. Customers' requirements for product shape, size, and complexity. Higher requirements will correspondingly increase manufacturing costs.
2. PDMS is a more complex 3D printing technology; the equipment cost and maintenance fees are relatively high, which also makes the price slightly higher. Additionally, factors such as the precision of design drafts, errors in the conversion process of drawings, and supplementary procedures like software modeling simulations must be considered in the production process. All these elements will be reflected in the final price.
In summary, specific charges will be determined based on actual requirements; the information provided above is for reference only. Please consult with staff for more details.

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