Electrostatic discharge protection circuit
A technology for electrostatic discharge protection and electrostatic discharge detection, applied in the field of electrostatic discharge protection circuits, can solve problems such as limiting the size of integrated circuit chips
Active Publication Date: 2012-10-31
UNITED MICROELECTRONICS CORP
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Problems solved by technology
However, in the known integrated circuit chip, the capacitor 16 and the resistor 18 occupy a certain proportion of the area of the integrated circuit chip. Therefore, when the number of power line sets 10 required by the integrated circuit chip is larger, the capacitor 16 and the resistor 18 of the electrostatic discharge protection circuit 12 The number of resistors 18 must also be more, thereby limiting the size of the integrated circuit chip
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[0061] Please refer to figure 2 , figure 2 It is a schematic circuit diagram of the electrostatic discharge protection circuit of the first preferred embodiment of the present invention. like figure 2 As shown, the ESD protection circuit 100 is electrically connected to at least two power line sets 102 , 104 for protecting various ESD modes occurring in the power line set 102 . The power cord sets 102, 104 include a first power cord set 102 and a second power cord set 104, wherein the first power cord set 102 has a first high-voltage power cord 102a and a first low-voltage power cord 102b, and the second The power cord set 104 has a second high voltage power cord 104a and a second low voltage power cord 104b. In this embodiment, the first high-voltage power line 102a provides a first voltage, for example: 2.5 volts or 3.3 volts, and the first low-voltage power line 102b is a ground terminal, so that the first power line group 102 can be used for driving input / output (...
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The invention relates to an electrostatic discharge protection circuit which comprises an electrostatic discharge detection circuit an a plurality of power clamp circuit, wherein the electrostatic discharge detection circuit is electrically connected to a first high-voltage power line, a second high-voltage power line and at least one low-voltage power line, and is used for detecting the static electricity of the first high-voltage power line and the static electricity of the second high-voltage power line; and the electrostatic discharge detection circuit comprises a first trigger unit and a second trigger unit, which are respectively electrically connected to the first high-voltage power line and the second high-voltage power line; and each power clamp circuit is respectively provided with a trigger point, and the trigger point is electrically connected to the first trigger unit and the second trigger unit.
Description
technical field [0001] The present invention relates to an electrostatic discharge protection circuit, in particular to an electrostatic discharge protection circuit for protecting an integrated circuit electrically connected to at least two power line groups. Background technique [0002] With the advancement of technology, the process technology of integrated circuits has also been continuously improved, so various electronic circuits can be integrated / formed on a single chip. Currently, integrated circuit chips can be divided into core circuits and input / output circuits, and the core circuits and input / output circuits are respectively driven by voltage sources of different sizes. In order to enable the core circuit and the input / output circuit to receive external voltage sources, conductive core power pads and input / output power pads are provided on the integrated circuit chip. [0003] However, when the chip is in the process of packaging, testing, transportation, proce...
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IPC IPC(8): H02H9/04H01L27/02
Inventor 林源琮吴德昌
Owner UNITED MICROELECTRONICS CORP