The US intends to announce as early as Wednesday (15th) the introduction of more measures aimed at preventing advanced chips from TSMC (TSM.US) and other manufacturers from flowing into China, Bloomberg reported, citing sources.Those measures will require chip manufacturers, including TSMC, Samsung Electronics, and Intel (INTC.US) , to scrutinize their customers more carefully and strengthen due diligence.Related NewsG Sachs Lists CN Stocks that Ride on Increased CN Govt Spending (Table)The US aims to shut the backdoor that allows Chinese customers like Huawei to obtain advanced chips, according to the report. The proposed new regulations are intended to assist chip manufacturers in identifying which designs and customers are subject to US trade restrictions depending on the chip's performance.It is understood that the sale of all chips at 14nm or 16nm and below will be restricted and will require government approval for sales in China and other related countries.(Real-time Streaming US Stocks Quote; Except All OTC quotes are at least 15 minutes delayed.)