Circuit device with electrostatic protection function
A circuit device and electrostatic protection technology, applied in the direction of circuits, electrical components, electric solid devices, etc., can solve problems such as damage to integrated circuit components, accumulated static electricity, and reduced protection capabilities
Active Publication Date: 2020-03-17
ALI CORP
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Problems solved by technology
For example, the human body may accumulate static electricity when walking on the ground. When a person touches an integrated circuit, the static electricity can enter the integrated circuit through the pins of the integrated circuit, causing damage to the internal components of the integrated circuit
With the advanced process technology of integrated circuits, the size of components is gradually reduced, and the protection ability of components against ESD is gradually reduced. However, the static electricity generated in the external environment has not decreased.
Method used
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Embodiment Construction
[0011] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0012] The ESD protection circuit is an integrated circuit specially used for electrostatic discharge protection. The electrostatic discharge protection circuit provides an ESD current path for the discharge of electrostatic current, so as to prevent the electrostatic current from flowing into the internal circuit of the IC and causing damage to the IC. Since the ESD comes from outside the integrated circuit, the ESD protection circuit is usually placed adjacent to the signal pad (PAD). Taking a Complementary Metal-Oxide-Semiconductor (CMOS) integrated circuit as an example, the signal pad is usually connected to the gate of the input stage component, and the gate oxide layer is easily penetrated by ESD. , so a set of ESD protection circuits can be set next to the signal pads to protect the in...
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The invention discloses a circuit apparatus having electrostatic protection. The circuit apparatus includes a first signal loose joint pad, a first electrostatic discharge path, and a second electrostatic discharge path. The first electrostatic discharge path includes a first power supply rail, a first signal electrostatic discharge circuit, and at least one first power supply electrostatic discharge circuit. The first signal electrostatic discharge circuit is coupled between the first power supply rail and the first signal loose joint pad. The at least one first power supply electrostatic discharge circuit is coupled between the first power supply rail and a grounded power supply rail. The second electrostatic discharge path includes a second power supply electrostatic rail and at least one second power supply electrostatic discharge circuit. The at least one second power supply electrostatic discharge circuit is coupled between the second power supply rail and the grounded power supply rail. The voltage level of the first power supply rail is lower than the voltage level of the second power supply rail. When the first signal loose joint pad generates static electricity, the first electrostatic discharge circuit path releases a first external signal.
Description
technical field [0001] The present invention relates to a circuit device with electrostatic protection function, and in particular to a circuit device with multiple power rails. Background technique [0002] Substances in nature may gain or lose electrons through friction or induction electrification. This type of charge is called static electricity. When these charges are gradually accumulated, a potential difference will be generated with the surrounding environment. If the charge transfers between different potentials through the discharge path, it is called Electrostatic Discharge (ESD) phenomenon. [0003] The JEDEC organization differentiates the causes of ESD and the way it discharges integrated circuits (Integrated Circuit, IC), and classifies ESD into several different modes, including Human-Body Model (HBM), Machine Model (Machine Model) ,MM), component charging mode (Charge-Device Model, CDM). For example, the human body may accumulate static electricity when wa...
Claims
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IPC IPC(8): H01L27/02
CPCH01L27/0248
Inventor 李传胜高秉佑
Owner ALI CORP