A method for online detection of flip-chip LED chips
A technology of LED chip and detection method, which is applied in the direction of testing optical performance, single semiconductor device testing, etc., to achieve the effect of speeding up chip detection efficiency, ingenious design and high positioning accuracy
Active Publication Date: 2018-06-12
HUAZHONG UNIV OF SCI & TECH
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[0004] In view of the above defects or improvement needs of the prior art, the present invention provides an online detection method for flip-chip LED chips, thereby solving the problem of intelligent, fast and accurate testing of flip-chip LED chips
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[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0022] The online detection method of the LED flip-chip LED chip based on the online detection device of the present invention comprises the following steps:
[0023] (1) The transportation and transmission assembly 3 moves the chip to be tested on the stage 11 to the top of the light receiving port of the integrating sphere 2111;
[0024] (2) The integrating sphere lifting device moves upward ...
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The invention discloses a flip LED chip on-line detecting method. The method comprises that, when in work, enabling a conveying system to convey a disc worktable to an appropriate working area; after adjusting the pose of the disc worktable, starting a detecting alignment system to control a probe worktable, enabling a probe to be in contact with a chip to be test to power on the chip and accordingly enabling the chip to emit light, then detecting the chip through a light receiving testing module. The flip LED chip on-line detecting method can successfully solve the problem that the electrode and the light emitting surface of a flip LED chip electrode are on different sides; meanwhile, by means of the precise image movement control technology, high-speed and precise testing of flip LED chips can be achieved, and the chip detecting efficiency can be improved. The flip LED chip on-line detecting method solves the problem that the electrode and the light emitting surface of the flip LED chip electrode are on the different sides, and through cooperation with high-precision control parts, can achieve rapid on-line detection of the flip LED chips.
Description
technical field [0001] The invention belongs to the field of flip-chip LED chip testing, and more particularly relates to an online detection method for flip-chip LED chips. Background technique [0002] Compared with traditional formal LED chips, flip-chip LED chips have improved light efficiency and production costs to varying degrees, and the importance of flip-chip LED chips has become increasingly prominent. At the same time, new requirements have been put forward for the corresponding detection technology and equipment. , The flip-chip LED chip online detection equipment is used to complete the detection of the photoelectric parameters of the flip-chip LED chip and generate a unified data file according to the parameter classification, and cooperate with the LED sorting equipment to realize the classification of the flip-chip LED chip and increase the added value of the product. [0003] Existing LED chip testing equipment is mostly aimed at front-mounted LED chips, an...
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IPC IPC(8): G01R31/26G01M11/02
Inventor 贺松平陈腾飞吴文超钟富强李达邓宇书杨璐邱园红
Owner HUAZHONG UNIV OF SCI & TECH