Summary of Conference Call Records Industry Overview - The focus is on the synthetic diamond production industry, particularly in the context of investments from the US and Japan, highlighting the necessity and urgency of diamond materials recognized internationally [1][2]. Key Points - The US and Japan are planning to invest in synthetic diamond production, with Japan's proposed $550 billion investment being a core project, expected to be announced before Prime Minister Kishida's visit to the US in March [1]. - The US aims to accelerate domestic synthetic diamond production, involving leading diamond companies such as De Beers Group's Element Six [1]. - Investors are encouraged to focus on the diamond sector, particularly due to the emerging markets in AI chip cooling and ultra-hard material drilling, with a market potential estimated at 30-50 billion yuan [1]. Company Insights - **Sifangda**: - In the first half of 2025, Sifangda has sent samples to two major semiconductor clients for testing [2]. - The company has completed internal testing of its 12-inch diamond heat sink samples and plans to send them out soon [2]. - New customer sample verification results are promising, with expectations for further progress [2]. - **World**: - Progress includes sending 12-inch thin slices for testing in September and recently sending smaller-sized thick slices with microchannels for testing by a Taiwanese client [2]. - The company is currently processing 12-inch thick slices with microchannels, expected to send samples in mid-Q1 2026 [2]. - A Taiwanese client has placed orders for dozens of large-sized thick slices recently [2]. - The value of thin slices has increased from 15,000 yuan to 30,000 yuan per piece, while the new thick slices with microchannels are valued at least 40,000 to 50,000 yuan each [2]. Additional Applications - Beyond cooling, significant breakthroughs in diamond applications are anticipated in PCD (Polycrystalline Diamond) drilling tools [2]. - PCD diamond drill bits can achieve over 10,000 stable processing holes, significantly improving efficiency and reducing tool change time [3]. - Both Sifangda and World are making rapid progress in the PCD drill bit and diamond heat sink sectors, with expectations for more customer developments [3].