Electronic apparatus and method for determining cause of mounting failure for component mounted on substrate

Patent metadata

Field	Value
Publication number	US-2021105920-A1
Application number	US-201916621142-A
Country	US
Kind code	A1
Filing date	Jun 28, 2019
Priority date	Jun 28, 2018
Publication date	Apr 8, 2021
Grant date	—

Abstract

A method for determining a cause of a mounting failure for a component mounted on a substrate, which is performed by an electronic apparatus, comprises: receiving an inspection result of a mounting failure for each of a plurality of first components determined by inspecting a plurality of substrates of a first type; calculating a mounting failure rate of each of the plurality of first components using the inspection result; determining a plurality of second components in which a mounting failure has occurred based on the mounting failure rate; and determining a cause of the mounting failure for each of the plurality of second components as at least one of a component mounting position setting error, a mounting condition setting error according to a component type and a defect of a nozzle, based on the mounting failure rate of each of the plurality of first components.

First claim

What is claimed is:

1 . A method for determining a cause of a mounting failure for a component mounted on a substrate, which is performed by an electronic apparatus, comprising:
receiving an inspection result of a mounting failure for each of a plurality of first components determined by inspecting a plurality of substrates of a first type on which the plurality of first components are mounted, a mounting position of each of the plurality of first components on the substrate of the first type being different to each other; calculating a mounting failure rate of each of the plurality of first components using the inspection result; determining a plurality of second components in which a mounting failure has occurred among the plurality of first components based on the mounting failure rate of each of the plurality of first components; and determining a cause of the mounting failure for each of the plurality of second components as at least one of a component mounting position setting error, a mounting condition setting error according to a component type and a defect of a nozzle included in a mounter, based on the mounting failure rate of each of the plurality of first components.

2 . The method of claim 1 , wherein the calculating the mounting failure rate of each of the plurality of first components comprises:
classifying the plurality of substrates of the first type into at least one substrate of the first type in which the mounting failure for each of the plurality of first components has not occurred and at least one substrate of the first type in which a mounting failure for each of the plurality of first components has occurred by using the inspection result; and calculating the mounting failure rate of each of the plurality of first components by using the number of the at least one substrate of the first type in which the mounting failure for each of the plurality of first components has not occurred and the number of the at least one substrate of the first type in which the mounting failure for each of the plurality of first components has occurred.

3 . The method of claim 1 , wherein the determining the plurality of second components in which the mounting failure has occurred among the plurality of first components comprises:
determining a plurality of components having a mounting failure rate equal to or greater than a predetermined first threshold value among the mounting failure rates of the plurality of first components; and determining the determined plurality of components as the plurality of second components.

4 . The method of claim 1 , wherein the determining the cause of the mounting failure for each of the plurality of second components comprises:
classifying the plurality of first components into a plurality of first component groups according to a plurality of first component types, each of the plurality of first components being classified as one of the plurality of first component types; determining a plurality of second component groups including at least one of the plurality of second components among the plurality of first component groups; comparing mounting failure rates of a plurality of third components included in each of the plurality of second component groups with each other, based on the mounting failure rate of each of the plurality of first components; and determining a cause of a mounting failure for a plurality of fourth components selected from among the plurality of second components based on the comparison result as the component mounting position setting error.

5 . The method of claim 4 , wherein each of the plurality of fourth components is, in one of the plurality of second component groups, a component having a mounting failure rate determined as an outlier based on the comparison result.

6 . The method of claim 4 , wherein the determining the cause of the mounting failure for each of the plurality of second components further comprises:
calculating a mounting failure rate of each of the plurality of first component types based on a mounting failure rate of each of a plurality of fifth components except for the plurality of fourth components, among the plurality of first components; classifying the plurality of first component types into a plurality of first component type groups according to a plurality of first nozzles used to mount the plurality of first components; comparing the mounting failure rates of the plurality of first component types included in each of the plurality of first component type groups; and determining a cause of a mounting failure for a plurality of sixth components, classified as a plurality of second component types selected based on the comparison result, as the mounting condition setting error according to a component type.

7 . The method of claim 6 , wherein each of the plurality of second component types is, in one of the plurality of first component type groups, a component type having a mounting failure rate determined as an outlier based on the comparison result.

8 . The method of claim 6 , wherein the determining the cause of the mounting failure for each of the plurality of second components further comprises:
calculating a mounting failure rate of each of the plurality of first nozzles, based on a mounting failure rate of each of a plurality of third component types except for the plurality of second component types, among the plurality of first component types; comparing the mounting failure rates of the plurality of first nozzles; and determining, among the plurality of second components, a cause of a mounting failure for a plurality of seventh components, mounted by using at least one second nozzle selected based on the comparison result, as the defect of the nozzle.

9 . The method of claim 8 , wherein the at least one second nozzle is, among the plurality of first nozzles, a nozzle having a mounting failure rate determined as an outlier based on the comparison result.

10 . The method of claim 8 , further comprising:
adjusting amounting failure rate of at least one third nozzle except for the at least one second nozzle among the plurality of first nozzles; adjusting amounting failure rate of at least one component type among the plurality of first component types based on at least one of the mounting failure rate of the at least one second nozzle and the adjusted mounting failure rate of the at least one third nozzle; adjusting amounting failure rate of at least one of the plurality of first components based on at least one of a mounting failure rate of the at least one second nozzle, a mounting failure rate of the adjusted at least one third nozzle and a mounting failure rate of the adjusted at least one component type; and calculating a contribution degree of the component mounting position setting error, the mounting condition setting error according to a component type and the defect of the nozzle included in the mounter to the occurrence of the mounting failure for each of the plurality of second components based on the mounting failure rate adjustment result.

11 . The method of claim 10 , further comprising:
generating and displaying a graph indicating a relationship between the plurality of first components, the plurality of first component types and the plurality of first nozzles, wherein the adjusted mounting failure rate of each of the plurality of first components, the adjusted mounting failure rate of each of the plurality of first component types and the adjusted mounting failure rate of each of the plurality of first nozzles are indicated in the graph.

12 . The method of claim 10 , further comprising:
generating and displayin

Assignees

• Koh Young Tech Inc

Inventors

• Lee Jong Myoung
• Lee Duk Young
• Choi Su Hyeong
• Jeong Hyeon Su

Classifications

• G03B43/00

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• H05K13/081 Primary

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• H04N17/002

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• H05K13/0409

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• G01B11/002

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