CN109590631B - Weldability detection method - Google Patents
Weldability detection method Download PDFInfo
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- CN109590631B CN109590631B CN201811407452.6A CN201811407452A CN109590631B CN 109590631 B CN109590631 B CN 109590631B CN 201811407452 A CN201811407452 A CN 201811407452A CN 109590631 B CN109590631 B CN 109590631B
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- pad
- comparison
- tested
- plastic block
- bonding pad
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
Abstract
The invention discloses a weldability detection method, which comprises the following steps: providing a product to be tested, a comparison bonding pad and a standard amount of plastic block, wherein the bonding pad to be tested is injected on the product to be tested; the product to be tested is used as a test group, and the comparison bonding pad and the plastic block with the standard dosage are arranged as a comparison group; respectively placing welding materials with the same size on the pad to be tested and the comparison pad; respectively blowing hot air with the same parameters to the pad to be tested and the comparison pad by using a hot air gun, and heating the welding material until the welding material is spread; and comparing the time difference from heating to finishing spreading of the welding materials on the pad to be tested and the comparison pad.
Description
Technical Field
The invention belongs to the technical field of detection methods, and particularly relates to a weldability detection method.
Background
In the prior art, there are various methods for detecting the solderability of a metal pad, including a tin-wetting balance method, a tin ball-wetting balance method, etc., and the basic principle is to detect the solderability of the pad by using the adsorption force of the pad and liquid metal. However, these methods are suitable for tests using pure metal parts, and it is difficult to ensure the accuracy of solderability detection in the case of metal embedded into plastic, for example, when a tin-dipping balance test is performed, because the area of the bonding pad is small, the surrounding plastic or other structures inevitably touch the metal soldering liquid during the tin dipping process, which may have a great influence on the test result.
In actual operation, the influence of injection molding on the weldability of the welding pad is detected by adopting the method after the welding pad is accurately cut or stripped, but the consistency of the detection result of the welding pad and the actual condition cannot be ensured due to the stripping of plastic; particularly, for a pad with a small size or a pad with a high peeling difficulty, the peeling or cutting method is difficult to implement, and a countermeasure is lacked.
Accordingly, there is a need to provide an improved solderability test method.
Disclosure of Invention
An object of the present invention is to provide a new technical solution for a solderability test method.
According to a first aspect of the present invention, there is provided a solderability test method, comprising the steps of:
providing a product to be tested, a comparison bonding pad and a standard amount of plastic block, wherein the bonding pad to be tested is injected on the product to be tested;
the product to be tested is used as a test group, and the comparison bonding pad and the plastic block with the standard dosage are arranged as a comparison group;
respectively placing welding materials with the same size on the pad to be tested and the comparison pad;
respectively blowing hot air with the same parameters to the pad to be tested and the comparison pad by using a hot air gun, and heating the welding material until the welding material is spread;
and comparing the time difference from heating to finishing spreading of the welding materials on the pad to be tested and the comparison pad.
Optionally, the method further comprises the following steps:
placing the test group in a heat insulation box; and arranging a comparison pad and a standard dosage of plastic block in the other heat insulation box.
Optionally, the method further comprises the following steps:
providing an initial part, a contrast bonding pad and a plastic block of a product to be tested;
and determining the standard dosage of the plastic block according to the initial part, so that the temperature curves of the pad to be tested on the initial part and the comparison pad in the comparison group are the same when the pads are heated by hot air.
Optionally, the specific step of determining the standard usage of the plastic block according to the initial piece includes:
the initial part is a calibration group, and the comparison bonding pad and the plastic block are calibration groups;
respectively blowing hot air with the same parameters to the pad to be tested and the comparison pad by using a hot air gun;
and comparing the temperature change curves of the pad to be tested of the initial part and the comparison pad.
And according to the comparison result of the temperature change curves, adjusting the using amount of the plastic block or/and changing the relative position between the plastic block and the comparison bonding pad.
Optionally, the specific step of determining the standard usage of the plastic block according to the initial piece further includes:
and respectively connecting temperature sensors to the pad to be tested and the comparison pad of the initial piece.
Optionally, the specific step of determining the standard usage of the plastic block according to the initial piece further includes:
and respectively using a radiation temperature measuring instrument to carry out temperature detection on the pad to be detected and the contrast pad of the initial part.
Optionally, the method further comprises the following steps:
the initial piece is placed in one heat insulation box, and the contrast bonding pad and the plastic block are placed in the other heat insulation box.
Optionally, the method further comprises the following steps:
when the comparison group is arranged, the relative position between the comparison bonding pad and the plastic block is the same as the relative position between the comparison bonding pad and the plastic block in the calibration group.
Optionally, the method further comprises the following steps:
the provided plastic block with the standard dosage is divided into a plurality of blocks which are arranged on the periphery of the comparison bonding pad and are tightly attached to the comparison bonding pad.
Optionally, the method further comprises the following steps:
changing the conditions of the pad to be tested on the product to be tested during injection molding, and preparing a modified part of the product to be tested;
and comparing the time difference from heating to finishing spreading of the welding materials on the pad to be tested on the modified piece and the comparison pad.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic representation of the steps of some embodiments of the inventions.
FIG. 2 is a schematic representation of steps of further embodiments of the present invention.
FIG. 3 is a schematic representation of steps of yet other embodiments of the present invention.
FIG. 4 is a schematic representation of a test panel in some embodiments of the invention.
FIG. 5 is a schematic illustration of a control group in some embodiments of the inventions.
FIG. 6 is a schematic side view of a control group in some embodiments of the invention.
In the figure: 1 product to be tested, 11 pad to be tested, 2 contrast pad, 3 plastic block, 4 heat insulation box and 5 welding material.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The present invention discloses a solderability test method, in some embodiments, with reference to fig. 1-6, comprising the steps of:
and providing a product 1 to be tested, a comparison bonding pad 2 and a standard dosage plastic block 3. Wherein, a pad 11 to be tested is injected on the product 1 to be tested; the comparison bonding pad 2 is a bonding pad 11 to be tested before injection molding.
Taking a product 1 to be tested as a test group; the control pad 2 and the standard amount of plastic block 3 are arranged as a control group so that the thermodynamic environments of the control pad 2 in the control group and the pad 11 to be tested in the test group are the same or approximately the same.
The same size of solder 5 is placed on each of the pad to be tested 11 and the control pad 2. The solder material 5 may be a solder ball or a tin alloy; furthermore, the solder ball can be 1mm, and the semi-circular grooves matched with the solder ball on the bonding pad 2 and the bonding pad 11 to be tested are compared.
And respectively blowing hot air with the same parameters to the pad to be tested 11 and the comparison pad 2 by using a hot air gun, and heating the welding material 5 until the welding material 5 is spread completely.
And respectively recording the time from heating to finishing spreading of the welding materials 5 on the pad 11 to be tested and the comparison pad 2. And comparing the time difference from heating to finishing spreading of the welding materials 5 on the pad 11 to be tested and the comparison pad 2, wherein the time of finishing spreading reflects the weldability of the pads, the time of finishing spreading is different when the adsorption force of the pad 11 to be tested and the comparison pad 2 to the liquid metal is different, and the longer the time of finishing spreading is, the poorer the weldability is.
By using the method and the device, the weldability of the metal piece such as the injection-molded bonding pad can be detected. Furthermore, by comparing the weldability change of the welding disc before and after injection molding, the influence of injection molding on the weldability of the welding disc can be detected.
In some embodiments, referring to fig. 2 and 3, the following steps may also be included:
placing the test group in a thermally insulated box 4; a control pad 2 and a standard dose of plastic block 3 are arranged in another thermally insulated box 4. The influence of the external environment on the weldability detection is reduced as much as possible, and the detection error is reduced.
In some embodiments, referring to fig. 2 and 3, the following steps may also be included:
the initial part of the product 1 to be tested, the reference pads 2 and the plastic block 3 are provided.
And determining the standard dosage of the plastic block 3 according to the initial part, so that the temperature curves of the pad 11 to be tested on the initial part and the comparison pad 2 in the comparison group are the same when the pad is heated by hot air. The detection precision of the invention is improved by reducing the deviation of detection data caused by the fact that the temperature rise speed of the single comparison bonding pad 2 is higher than that of the bonding pad 11 to be detected due to the heat absorption of materials such as plastic cement and the like around the bonding pad 11 to be detected.
In some embodiments, with reference to fig. 2 and 3, the specific step of determining the standard dosage of the plastic mass 3 from the initial piece may comprise:
the initial part is used as a calibration group, and the contrast bonding pad 2 and the plastic block 3 are used as a calibration group;
respectively blowing hot air with the same parameters to the pad 11 to be tested and the comparison pad 2 in the calibration group by using a hot air gun;
recording the temperature change curves of the pad 11 to be tested of the initial part and the comparison pad 2 in the calibration group;
and comparing the temperature change curves of the pad 11 to be tested of the initial part and the comparison pad 2, and judging whether the temperature change curves are the same or not, so as to judge whether the consumption of the plastic block 3 is proper or not and whether the thermal environment of the pad 11 to be tested under the same condition can be simulated or not.
Further, referring to fig. 2 and 3, the specific steps of determining the standard dosage of the plastic block 3 according to the initial part further include:
according to the comparison result of the temperature change curve, adjusting the using amount of the plastic block 3 or/and changing the relative position between the plastic block 3 and the comparison bonding pad 2;
and then repeatedly using a hot air gun to respectively blow hot air with the same parameters to the pad 11 to be tested and the comparison pad 2 in the calibration group, and recording and comparing temperature change curves of the pad 11 to be tested of the initial part and the comparison pad 2 in the calibration group until the temperature change curves are completely the same or approximately the same, so that the thermodynamic environment of the comparison pad 2 in the calibration group is the same or approximately the same as that of the pad 11 to be tested in the heating process.
In some embodiments, the specific step of determining the standard dosage of the plastic block 3 from the initial piece may further comprise:
referring to fig. 2, temperature sensors are respectively connected to the pad 11 to be measured and the control pad 2 of the initial member, and temperature change curves of the temperature sensors are accurately recorded.
Or, referring to fig. 3, the radiation thermometric instrument is used to detect the temperature of the pad 11 to be measured and the comparison pad 2 of the initial part, and the temperature change curves are accurately recorded.
In some embodiments, with reference to fig. 2 and 3, the specific step of determining from the initial piece the standard dose of the block of plastic 3 may also comprise:
the starting part is placed in one insulated box 4 and the control pad 2 and the plastic block 3 are placed in the other insulated box 4. The influence of the external environment on the weldability detection is reduced as much as possible, and the detection error is reduced.
In some embodiments, further comprising the steps of:
when the comparison group is arranged, the relative position between the comparison pad 2 and the plastic block 3 is the same as the relative position between the comparison pad 2 and the plastic block 3 in the calibration group. The thermodynamic environment of the comparison bonding pad 2 is ensured to be the same or approximately the same as that of the bonding pad 11 to be tested.
In some embodiments, referring to fig. 5, the following steps are further included:
the provided plastic block 3 with the standard dosage is divided into a plurality of blocks, is arranged on the periphery of the comparison bonding pad 2 and is tightly attached to the comparison bonding pad 2, fixes the comparison bonding pad 2, and simulates the injection molding state of the bonding pad 11 to be tested. The detection precision of the invention is improved.
In some embodiments, referring to fig. 3, the following steps are further included:
changing the conditions of the pad 11 to be tested on the product 1 to be tested during injection molding, and preparing a modified part of the product 1 to be tested;
repeating the detection process of the test group and the control group;
and comparing the time difference from heating to spreading of the welding materials on the pad 11 to be tested on the modified piece and the comparison pad 2, thereby judging the influence relationship of the changed injection molding conditions on the weldability of the pad.
According to the result obtained by detection, the method can be used for optimizing the injection molding process and reducing the influence of injection molding on the welding property of the welding pad.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A solderability test method, comprising the steps of:
providing a product to be tested, a comparison bonding pad and a standard amount of plastic block, wherein the bonding pad to be tested is injected on the product to be tested;
the product to be tested is used as a test group, and the comparison bonding pad and the plastic block with the standard dosage are arranged as a comparison group;
respectively placing welding materials with the same size on the pad to be tested and the contrast pad in the contrast group;
respectively blowing hot air with the same parameters to the pad to be tested and the comparison pad by using a hot air gun, and heating the welding material until the welding material is spread;
and comparing the time difference from heating to finishing spreading of the welding material on the pad to be tested and the welding material on the comparison pad.
2. The solderability test method of claim 1, further comprising the steps of:
placing the test group in a heat insulation box; and arranging a comparison pad and a standard dosage of plastic block in the other heat insulation box.
3. The solderability test method of claim 1, further comprising the steps of:
providing an initial part, a contrast bonding pad and a plastic block of a product to be tested;
and determining the standard dosage of the plastic block according to the initial part, so that the temperature curves of the pad to be tested on the initial part and the comparison pad in the comparison group are the same when the pads are heated by hot air.
4. The weldability detection method according to claim 3, characterized in that said specific step of determining the standard dosage of said plastic block from the starting piece comprises:
the initial part is a calibration group, and the comparison bonding pad and the plastic block are calibration groups;
respectively blowing hot air with the same parameters to the pad to be tested and the comparison pad by using a hot air gun;
comparing the temperature change curves of the pad to be tested of the initial part and the comparison pad;
and according to the comparison result of the temperature change curves, adjusting the using amount of the plastic block or/and changing the relative position between the plastic block and the comparison bonding pad.
5. The weldability detection method according to claim 4, characterized in that said specific step of determining the standard dosage of said plastic block from the starting piece further comprises:
and respectively connecting temperature sensors to the pad to be tested and the comparison pad of the initial piece.
6. The weldability detection method according to claim 4, characterized in that said specific step of determining the standard dosage of said plastic block from the starting piece further comprises:
and respectively using a radiation temperature measuring instrument to carry out temperature detection on the pad to be detected and the contrast pad of the initial part.
7. The solderability test method of claim 4, further comprising the steps of:
the initial piece is placed in one heat insulation box, and the contrast bonding pad and the plastic block are placed in the other heat insulation box.
8. The solderability test method of claim 4, further comprising the steps of:
when the comparison group is arranged, the relative position between the comparison bonding pad and the plastic block is the same as the relative position between the comparison bonding pad and the plastic block in the calibration group.
9. The solderability test method of claim 8, further comprising the steps of:
the provided plastic block with the standard dosage is divided into a plurality of blocks which are arranged on the periphery of the comparison bonding pad and are tightly attached to the comparison bonding pad.
10. The solderability test method of claim 1, further comprising the steps of:
changing the conditions of the pad to be tested on the product to be tested during injection molding, and preparing a modified part of the product to be tested;
and comparing the time difference from heating to finishing spreading of the welding materials on the pad to be tested on the modified piece and the comparison pad.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811407452.6A CN109590631B (en) | 2018-11-23 | 2018-11-23 | Weldability detection method |
| PCT/CN2019/108995 WO2020103576A1 (en) | 2018-11-23 | 2019-09-29 | Solderability detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811407452.6A CN109590631B (en) | 2018-11-23 | 2018-11-23 | Weldability detection method |
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| CN109590631A CN109590631A (en) | 2019-04-09 |
| CN109590631B true CN109590631B (en) | 2020-08-21 |
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| CN201811407452.6A Active CN109590631B (en) | 2018-11-23 | 2018-11-23 | Weldability detection method |
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| WO (1) | WO2020103576A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109590631B (en) * | 2018-11-23 | 2020-08-21 | 歌尔股份有限公司 | Weldability detection method |
| CN110672812A (en) * | 2019-09-17 | 2020-01-10 | 贵州航天电子科技有限公司 | Method for testing weldability of microwave QFN device |
| CN114986011A (en) * | 2022-04-27 | 2022-09-02 | 中国电子科技集团公司第三十八研究所 | Rapid nondestructive testing device and testing method for weldability of LTCC substrate |
| CN115302121B (en) * | 2022-07-26 | 2024-02-27 | 德中（天津）技术发展股份有限公司 | Reflow soldering test method for testing solderability of printed circuit board |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4284873B2 (en) * | 2001-02-27 | 2009-06-24 | ソニー株式会社 | Solderability test apparatus and solderability test method |
| CN2920512Y (en) * | 2006-04-29 | 2007-07-11 | 徐地华 | Separated weldability test instrument |
| CN102500945A (en) * | 2011-11-30 | 2012-06-20 | 中国航空工业集团公司第六三一研究所 | Method for testing welding performance of liquid-cooling radiators |
| CN102723428A (en) * | 2012-06-26 | 2012-10-10 | 田茂福 | Surface-mounted LED (Light-Emitting Diode) bracket and manufacturing method thereof |
| CN204912981U (en) * | 2015-05-26 | 2015-12-30 | 歌尔声学股份有限公司 | Reprocess workstation |
| CN105499822A (en) * | 2016-01-06 | 2016-04-20 | 桂林斯壮微电子有限责任公司 | Method for testing weldability of SMD (Surface Mounted Device) product |
| CN106064281B (en) * | 2016-05-31 | 2018-07-20 | 韩华新能源（启东）有限公司 | Photovoltaic applies quick discrimination method of the tin with solderability |
| CN205967849U (en) * | 2016-07-15 | 2017-02-22 | 广州兴森快捷电路科技有限公司 | Pad weldbility testing arrangement and test system |
| CN206161794U (en) * | 2016-10-14 | 2017-05-10 | 太仓市何氏电路板有限公司 | Circuit board weldbility test platform |
| CN107096973B (en) * | 2017-05-17 | 2019-08-16 | 北京航空航天大学 | A kind of soldering and detection device |
| CN109590631B (en) * | 2018-11-23 | 2020-08-21 | 歌尔股份有限公司 | Weldability detection method |
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| WO2020103576A1 (en) | 2020-05-28 |
| CN109590631A (en) | 2019-04-09 |
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