Manufacturing process of medical silicone wrapped circuit board?
The manufacturing process of medical grade silicone wrapped circuit boards (especially flexible circuit boards, FPC) is a special process that combines medical grade silicone materials with circuit board protection requirements. The following are the main steps and precautions of this process:
1、 Main steps
Circuit board cleaning:
Thoroughly clean the FPC circuit board to ensure that the surface is free of dust, oil stains, or other impurities. This step is crucial for the subsequent adhesion of silicone gel.
Silicone selection and blending:
Select suitable medical grade silicone materials based on the special requirements of medical products, such as biocompatibility, chemical corrosion resistance, high temperature resistance, etc.
According to the formula requirements, mix the silicone material with other additives such as colorants, viscosity modifiers, etc.
Silicone coating:
Apply the prepared silicone evenly onto the surface of the FPC using methods such as spraying, brushing, or dipping, ensuring that all circuit lines are completely wrapped.
During the coating process, pay attention to controlling the thickness and uniformity of the silicone gel to avoid the formation of bubbles or voids.
Drying and curing:
Place the FPC circuit board coated with silicone in a constant temperature oven and dry it. The drying temperature and time are adjusted according to the requirements of the silicone material.
After drying, place the FPC circuit board in a constant temperature curing box for silicone curing. The curing temperature and time are also adjusted according to the requirements of the silicone material.
Quality inspection:
Conduct a comprehensive inspection of the FPC circuit board wrapped in silicone, including visual inspection, electrical performance testing, etc., to ensure that the packaging quality meets the requirements of medical products.
Packaging and Shipping:
Wrap the silicone FPC that has passed quality inspection in an anti-static bag or box and prepare for shipment. During the packaging process, pay attention to maintaining the cleanliness and integrity of the product.
2、 Precautions
Silicone formula and selection:
Medical silicone must meet the requirements of biocompatibility, non toxicity, and non irritation.
Select the appropriate silicone type and formula based on the specific application scenario.
Coating uniformity:
Ensure that the silicone covers the entire FPC circuit board evenly and completely during the coating process.
Use appropriate coating equipment and process parameters to avoid the formation of bubbles or voids.
Drying and curing conditions:
According to the requirements of silicone material, precisely control the temperature and time of drying and curing.
Avoid the performance degradation of silicone caused by insufficient drying or incomplete curing.
Quality Inspection and Control:
Establish a comprehensive quality inspection system to conduct comprehensive testing on FPC circuit boards wrapped in silicone.
Adopting advanced detection technology and equipment to improve detection accuracy and efficiency.
Environmental Protection and Sustainability:
During the production process, emphasis is placed on environmental protection and sustainable development.
Choose silicone materials and production processes that meet environmental standards.
In summary, the production process of medical silicone wrapped circuit boards is a complex and delicate task that requires strict control over the quality and parameters of each link. By adopting advanced process technology and equipment, as well as a comprehensive quality inspection system, the quality and performance of medical silicone wrapped circuit boards can be ensured to meet the requirements of medical products.
