The following are some well-known brands of soft board substrates:

1. DuPont: DuPont is a globally renowned chemical company that produces high-quality and reliable soft board substrates.

2. Rogers: Rogers has a wide range of product lines in the field of high-frequency circuit substrates, and its soft board substrates perform well in high-frequency applications.

3. Hitachi Huacheng: Hitachi Huacheng is a Japanese chemical enterprise, and its soft board substrate has a high reputation in the market.

4. Mitsubishi Gas Chemical: Mitsubishi Gas Chemical's soft board substrate is also widely recognized in terms of performance and quality.

5. Taihong: Taihong is a well-known substrate supplier in Taiwan, and its soft board substrate products are suitable for various application fields.

6. Shengyi Technology: Shengyi Technology is one of the leading domestic substrate manufacturers, and its soft board substrates have a certain market share.

7. Jiantao: Jiantao is also a well-known substrate brand in China, providing various types of soft board substrate products.

This is only a small number of soft board substrate brands, and there are many other suppliers in the market. When selecting soft board substrates, in addition to brand factors, it is also necessary to consider factors such as the performance, specifications, and cost of the substrate to meet specific application needs. At the same time, we can communicate with suppliers of various brands to understand their product characteristics and technical support, in order to make more suitable choices. If you have more specific requirements for a specific brand or performance characteristic of soft board substrates, Yixin Technology can provide more detailed information and suggestions.