Core Viewpoint - The semiconductor company Jianwenlu (Zhejiang) has been filed for bankruptcy review by Suzhou Xinneng Environmental Technology Co., Ltd. on July 11, 2025, indicating significant financial distress within the company [2][3]. Company Overview - Jianwenlu Semiconductor was established in 2016, focusing on the mass production of RF chips, particularly targeting the 5G RF communication sector and high-frequency filters, which are considered critical technologies [3][4]. - The company has developed a complete set of mass production processes for surface acoustic wave filters, duplexers, and multiplexers, achieving performance levels comparable to leading international brands, and holds 57 patents, including 35 domestic and 22 PCT international patents [3][4]. Development Milestones - In 2019, Jianwenlu successfully completed the first version of its resonator chip with independent intellectual property rights [4]. - In 2020, the company achieved successful mass production of its Band 3 filter, utilizing aluminum nitride piezoelectric thin film device structures to circumvent international patent barriers [4]. - The first phase of the production line was initiated in March 2021, with a total investment of 1 billion yuan, capable of producing 1.63 billion MEMS RF chips annually, and was recognized as a significant provincial industrial project [4]. - By August 2022, the project was reported to have all equipment installed and was expected to commence production by the end of the month, with substantial orders already received [4]. - The company projected revenues exceeding 500 million yuan for 2024, with over 100 million yuan in orders by July 2023 [4]. Financial and Legal Issues - Jianwenlu Semiconductor has undergone four rounds of financing, attracting investments from various institutions, including Tsinghua Yangtze River Delta Research Institute and several venture capital firms [4]. - In July 2024, the company faced legal challenges due to patent agency contract disputes, followed by financial loan contract disputes and service contract disputes, leading to frozen equity and ultimately the bankruptcy filing [4].