Chip with isolation structure

Abstract

The present invention provides a chip with an isolation structure, which includes a wafer. The wafer includes: a substrate; a first circuit formed on the substrate; a circuit formed on the substrate adjacent to the first circuit. The second circuit; the isolation trench, which is located in the substrate portion between the first circuit and the second circuit, wherein the substrate portion between the first circuit and the second circuit is called the substrate gap region; the metal connection layer , which is located on the first surface of the substrate and straddles the substrate gap region, and the metal connection layer is used to electrically connect the first circuit and the second circuit. Compared with the prior art, the first circuit and the second circuit in the present invention are located on the same substrate, and the substrate portion between the first circuit and the second circuit is cut by laser to form an isolation trench, thereby Enhanced circuit isolation performance.

Description

【Technical field】 [0001] The invention relates to the technical field of chip design, in particular to a chip with an isolation structure, which can enhance circuit isolation performance. 【Background technique】 [0002] In chip design, enhancing the isolation between circuits can reduce the influence of noisy circuits on sensitive circuits. Please refer to figure 1 As shown, it describes a schematic diagram of integrating Part_A and Part_B two circuits on the same chip in the prior art. The advantage of this is high integration and high processing efficiency. But there will be a problem that one circuit interferes with another circuit, for example, Part_A is a digital circuit with a lot of noise (Part_A can be called a noise circuit), and Part_B is an analog circuit sensitive to noise (Part_B can be called a sensitive circuit). In this way, the interference of the digital circuit to the analog circuit will be generated, the performance of the analog circuit will be reduce...

AI Technical Summary

Problems solved by technology

But there will be a problem that one circuit interferes with another circuit. For example, Part_A is a digital circuit with a lot of noise (Part_A can be called a noise circuit), and Part_B is an analog circuit that is sensitive to noise (Part_B can be called a sensitive circuit).

This will cause the interference of the digital circuit to the analog circuit, reduce the performance of the analog circuit, and cause the function of the analog circuit to fail in severe cases.

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