Method and device for pre-detecting of particle impact noise detection (PIND)

A PIND, pre-detection technology, applied in measuring devices, cleaning methods and utensils, chemical instruments and methods, etc., to avoid scrap or rework and improve product quality control.

Active Publication Date: 2012-06-27
EAST CHINA INST OF OPTOELECTRONICS INTEGRATEDDEVICE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a PIND pre-detection method, which solves the problem that the circuit has to be scrapped or uncapped for rework after detecting redundant objects after packaging, so that the circuit can detect redundant objects before packaging. Detect and process, improve the level of product quality control

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  • Method and device for pre-detecting of particle impact noise detection (PIND)
  • Method and device for pre-detecting of particle impact noise detection (PIND)

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Embodiment Construction

[0029] A kind of PIND pre-detection method of the present invention mainly comprises the following several parts:

[0030] process flow

[0031] Such as figure 1 As shown, the substrate of the circuit packaging shell is cleaned → installed PIND pre-inspection device → PIND inspection → unqualified inspection is cleaned again → PIND re-examination is all qualified before parallel sealing and welding;

[0032] Specific steps are as follows:

[0033] 1 Cleaning treatment of circuit packaging shell substrate;

[0034] 2. Install PIND pre-detection device;

[0035] 3. PIND detection;

[0036] 4. If the test is unqualified, it will be cleaned again;

[0037] 5. Parallel sealing and welding will be carried out after all the PIND retests are qualified.

[0038] Step 1 The steps of cleaning the substrate of the circuit packaging shell are:

[0039] 1.1 Ultrasonic cleaning of the substrate: put a clean beaker containing absolute ethanol or other special cleaning containers (the l...

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Abstract

The invention relates to a method and a device for pre-detecting of particle impact noise detection (PIND). The method comprises cleaning and treating circuit substrates, installing the pre-detecting device of the PIND, performing the PIND, cleaning and treating the circuit substrate again if the circuit substrates are detected to be unqualified, performing parallel seal welding after all the circuit substrates are detected again to be qualified by means of the PIND. Redundancy can be detected and treated before the circuit is encapsulated, the fact that the redundancy is detected after the circuit is encapsulated so that the circuit has to be discarded or remade is avoided, and control level of product quality is improved. The invention further provides the device for pre-detecting of the PIND, the device comprises a container and a press board, wherein the container is provided with a cavity matched with an encapsulating casing, and the end face of an opening of the container is provided with the press board fixedly connected or separated from the container. The method and the device for the pre-detecting of the PIND solve the problem of fixation of the circuit encapsulating casing during pre-detecting, achieve simulation encapsulation of the circuit, and perform pre-detecting on free particles in the simulation encapsulating cavity so as to achieve an alarm function.

Description

technical field [0001] The invention relates to electronic detection technology, in particular to a PIND pre-detection method and a PIND pre-detection device. Background technique [0002] The Particle Impact Noise Detection (PIND) test is the most widely used test item, it can effectively detect loose particles in the circuit, and can be used as a 100% screening test. PIND is to install the circuit on the transducer of the sound coupling material. By impacting the vibrating circuit, the energy of the loose particles vibrating inside is converted into an acoustic signal and displayed on the oscilloscope to achieve the test purpose of being able to detect the vibrating particles inside the circuit. With the continuous improvement of the requirements for high reliability of electronic products, many circuits require the control of internal redundant substances to pass the PIND test, and the existing prevention and control measures for redundant substances are basically carried...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00G01V1/00B08B3/12
Inventor 李寿胜褚志斌侯育增李波
Owner EAST CHINA INST OF OPTOELECTRONICS INTEGRATEDDEVICE
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