CN1815163A - Sticking-element section sample, its making method and viewing method - Google Patents
Sticking-element section sample, its making method and viewing method Download PDFInfo
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- CN1815163A CN1815163A CN 200510033194 CN200510033194A CN1815163A CN 1815163 A CN1815163 A CN 1815163A CN 200510033194 CN200510033194 CN 200510033194 CN 200510033194 A CN200510033194 A CN 200510033194A CN 1815163 A CN1815163 A CN 1815163A
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Abstract
Present invention discloses a surface stuck component section sampling, manufacture and viewing method. In Surface stuck component section sampling, said surface stuck component embeds in transparent colour basal body, one side section of surface stuck component being equal high with basal body. Microscope is used for viewing the front side of surface stuck component section and back incident light is added in sampling back. Section sampling constructional definition made by said invention is greatly raised, having more clear and esthetic appearance of interface and terminal electrode pattern between each layer material in surface stuck component, being very useful for surface stuck resistive failure analysis (FA) and destruction physical analysis (DPA).
Description
Technical field
The present invention relates to technical field of electronic components, be specifically related to a kind of sticking-element section sample, and the method for making of this sticking-element section sample and observational technique.
Background technology
Sticking-element is the abbreviation of element pasted on surface, this electron-like element when using owing to be mounted on the circuit board, therefore be convenient to the installation of electronic devices and components and the wiring of circuit board, and can save the inner useful space of product, thereby make product with compact structure, volume dwindles greatly, therefore is widely used in the modern electronic product.
The sticking-element consumption is very big in the modern electronic product, and therefore usually having lost efficacy takes place.In order to find out failure cause, just need carry out failure analysis (FA) and Destructive Physical Analysis (DPA) to sticking-element.These analytical technology difficulty are bigger, and the key of analysis is how to improve the sharpness that element section is made, and it has directly determined to analyze the height of quality.
With the surface-mount resistor is example, and it is as follows that it analyzes the bigger reason of difficulty:
A) surface size of small-sized surface-mount resistor is very little, and for example: 1/20w is 1.0 * 0.5mm
2, 1/16w is 1.55 * 0.8mm
2, 1/10w is 2.0 * 1.25mm
2
B) inner structure of surface-mount resistor is very trickle: sandwich construction, the thickness of layers of material is micron order, and termination electrode respectively has difference by different method for making manufacturings.
Figure 1 shows that the cross-sectional view of the surface-mount resistor of using the manufacturing of sputter nickel chromium triangle technology.As seen from Figure 1; surface-mount resistor 1 comprises: ceramic matrix 2 and be positioned at the resistive film 3 of ceramic matrix 2 upper surfaces; be provided with diaphragm 4 at resistive film 3 outside surfaces, comprise a diaphragm 4a who makes by glass glaze and the second protection film 4b that makes by resin or glass glaze.Ceramic matrix 2 upper and lower surfaces also are respectively equipped with silver-colored palladium conduction band 5 and silver-colored conduction band 6, and wherein silver-colored palladium conduction band 5 is connected with resistive film 3.Silver conduction band 6 is connected with silver-colored palladium conduction band 5 by the sputter nicr layer 7a that is positioned at ceramic matrix 2 sides.Silver palladium conduction band 5, sputter nicr layer 7a and silver-colored conduction band 6 outsides form nickel coating 8 and tin lead layer 9 successively.The inefficacy of surface-mount resistor 1 mostly occurs at the position, boundary of each layer structure, on position, boundary 10.
Figure 2 shows that the cross-sectional view of using the surface-mount resistor that soaks silver-colored sizing process manufacturing.As seen from Figure 2; surface-mount resistor 1 comprises: ceramic matrix 2 and be positioned at the resistive film 3 of ceramic matrix 2 upper surfaces; be provided with diaphragm 4 at resistive film 3 outside surfaces, comprise a diaphragm 4a who makes by glass glaze and the second protection film 4b that makes by resin or glass glaze.Ceramic matrix 2 upper and lower surfaces also are respectively equipped with silver-colored palladium conduction band 5 and silver-colored conduction band 6, and wherein silver-colored palladium conduction band 5 is connected with resistive film 3.Silver conduction band 6 is connected with silver-colored palladium conduction band 5 by the silver slurry layer 7b that soaks that is positioned at ceramic matrix 2 sides.Silver palladium conduction band 5, soak silver slurry layer 7b and silver-colored conduction band 6 outsides form nickel coating 8 and tin lead layer 9 successively.The inefficacy of surface-mount resistor 1 mostly occurs at the position, boundary of each layer structure, on position, boundary 10.
In order to analyze the failure cause of sticking-element, the sticking-element that lost efficacy need be made section sample, examine under a microscope sticking-element section then, to analyze failure cause.Fig. 3 shows section sample preparation method's of the prior art process flow diagram.
Below in conjunction with Fig. 3, be example with the surface-mount resistor section sample, the preparation method of existing sticking-element section sample is described.This method comprises the steps:
Step S100 provides mould, prepares embedding;
Step S105 smears remover in dies cavity, so that in down-stream sample preparation is deviate from from mould;
Step S110 is placed in the mould surface-mount resistor is edge-on, and blended rubber is bonded on the mould chassis, moves to prevent it;
Step S115 disposes water white epoxy resin and hardening agent by a certain percentage and stirs;
Step S120 in mould, is surrounded the poured with epoxy resin that is mixed with hardening agent with surface-mount resistor;
Step S125, the sample preparation that cast is good is placed on and vacuumizes in the vacuum tank, gets rid of the bubble in the epoxy resin;
Step S130 at room temperature placed sample preparation 24 hours, made epoxy resin cure;
Step S135 adds water with No. 220 emery papers and roughly grinds 1/3 place to the resistance width on muller;
Step S140 adds the water fine grinding with 300,600, No. 800 emery papers respectively on muller, every number sand paper approximately ground 10-15 minute;
Step S145 adds suitable polishing fluid on polishing cloth, the sample preparation section polished, and about 15 minutes of time, until sample preparation section no marking, present mirror features, finish the preparation of section sample.
To be placed under the metaloscope by the section sample that said method is made, observe its resistance section, to analyze its failure cause.When examining under a microscope, microscopical enlargement factor can be taken pictures between 100-500 times simultaneously.Figure 4 shows that the photo of the section that the surface-mount resistor section sample that utilizes prior art to make is examined under a microscope.
As can see from Figure 4, the section sample that utilizes prior art to obtain can be clear that the element that is encapsulated in resin inside, and can see the section of the grinding part of element.But its shortcoming is: when the section that grinds out is observed under metaloscope; because no colour contrast; the diaphragm 4 of resistance is difficult to distinguish; therefore the pattern of the interface between termination electrode and the diaphragm 4 is difficult to observe; and the separatrix of resistance terminal electrode interior layers of material is clear inadequately, brings a lot of difficulties for the failure cause of accurately analyzing surface-mount resistor and the quality of judging processing quality.
Summary of the invention
The present invention be directed to the technical barrier that the sticking-element section sample sharpness is not high when sticking-element is analyzed that exists in the prior art proposes.
First purpose of the present invention provides a kind of new sticking-element section sample, and it is examined under a microscope down has cross-section structure clearly.
Second purpose of the present invention provides a kind of new sticking-element section sample method for making, makes the sticking-element section sample produce examine under a microscope following time and can have cross-section structure clearly.
The 3rd purpose of the present invention provides a kind of observational technique of sticking-element section sample, can observe the clear cross-section structure according to sticking-element section sample of the present invention.
According to a first aspect of the invention, provide a kind of sticking-element section sample, sticking-element is embedded in the transparent base, and a side section of sticking-element is concordant with a surface of matrix, it is characterized in that matrix is the colored transparent shape.
Wherein, matrix is an epoxy resin, and sticking-element is a surface-mount resistor.
According to another aspect of the present invention, provide a kind of method for making of sticking-element section sample, comprised the steps: sticking-element is placed in the mould; Matrix material is packed in the mould, make it surround sticking-element and solidify; The matrix and the sticking-element that combine after solidifying are taken out, and the processing sticking-element section, make a side section of sticking-element concordant with a surface of matrix, form sticking-element section sample, it is characterized in that wherein matrix is the colored transparent shape.
Wherein, matrix material is colourless epoxy resin, earlier it is mixed with hardening agent before mould that colourless epoxy resin is packed into, and adds coloring agent, stirs, and then it is poured into the mould of putting into sticking-element.
According to another aspect of the present invention, a kind of observational technique of sticking-element section sample is provided, sticking-element section sample comprises sticking-element and transparent base, sticking-element is embedded in the transparent base, and a side section of sticking-element is concordant with a surface of matrix, and this method comprises: sticking-element section sample is placed on microscopically; Section by the microscopic examination sticking-element is characterized in that, matrix is the colored transparent shape, and provides back surface incident light at the back side of sample preparation when observing sticking-element section sample.
When observing sticking-element section sample, provide the front incident light, and regulate the relative intensity of front incident light and back surface incident light, with the clear interface that shows between inner each layer structure of sticking-element section in the front of sample preparation.
Wherein, only a backlight provides back surface incident by being provided with on microscope, and backlight ringwise.
The section sample of producing with present technique is also observed with new method, and the sharpness of the cross-section structure of sticking-element improves a lot, and interface and termination electrode pattern between the inner layers of material of sticking-element are clear more attractive in appearance.
Present technique is very useful for the failure analysis (FA) and the Destructive Physical Analysis (DPA) of surface-mount resistor.It has not only significantly improved the section fabricating quality and the observing effect of sticking-element, and cost is low, and is easy and simple to handle, is convenient to promote.
Description of drawings
Below in conjunction with accompanying drawing, describe the specific embodiment of the present invention in detail.
Figure 1 shows that the cross-sectional view of the surface-mount resistor of using the manufacturing of sputter nickel chromium triangle technology;
Figure 2 shows that the cross-sectional view of using the surface-mount resistor that soaks silver-colored sizing process manufacturing;
Figure 3 shows that the process flow diagram of sticking-element section sample method for making of the prior art;
Figure 4 shows that the photo of the section that the surface-mount resistor section sample that utilizes prior art to make is examined under a microscope;
Figure 5 shows that according to the surface-mount resistor section sample of prior art and outward appearance comparison diagram according to surface-mount resistor section sample of the present invention;
Figure 6 shows that process flow diagram according to new surface-mount resistor method for making of the present invention;
Figure 7 shows that synoptic diagram according to observational technique of the present invention;
Figure 8 shows that the photo of the section of examining under a microscope with the surface-mount resistor section sample of red epoxy resin making;
Figure 9 shows that the photo of the section of examining under a microscope with the surface-mount resistor section sample of blue color circle epoxy resins making;
Figure 10 shows that the photo of the section of examining under a microscope with the surface-mount resistor section sample of yellow epoxy resin making.
Embodiment
Referring to Fig. 5, comprise water white epoxy resin-base 20 and be embedded in surface-mount resistor 1 in the matrix 20 that according to the surface-mount resistor section sample A of prior art the observation section of surface-mount resistor is concordant with a surface of matrix.The epoxy resin-base 21,22 and 23 and be embedded in surface-mount resistor 1 in matrix 21,22 and 23 that comprises colored transparent according to surface-mount resistor section sample B of the present invention, C and D.
Referring to Fig. 6, be example with the surface-mount resistor section sample, the preparation method according to sticking-element section sample of the present invention is described.This method comprises the steps:
Step S200 provides mould, prepares embedding;
Step S205 smears remover in dies cavity, so that in down-stream sample preparation is deviate from from mould;
Step S210 is placed in the mould surface-mount resistor is edge-on, and blended rubber is bonded on the mould chassis, moves to prevent it;
Step S215 disposes about 10ml in proportion with water white transparency epoxy resin and hardening agent, unlike the prior art be, also to add a small amount of dyeing of plastics agent in this step, stir together then.Water white transparency epoxy resin and hardening agent can be selected the E-51 type resin and plastic of Shanghai resin company limited for use, the beautiful board mill base of love that coloring agent can select for use Finland CPS color group company to produce.
Step S220 in mould, is surrounded the poured with epoxy resin that is mixed with hardening agent with surface-mount resistor;
Step S225, the sample that cast is good is placed on and vacuumizes in the vacuum tank, gets rid of the bubble in the resin;
Step S230 at room temperature places and was cured in 24 hours;
Step S235 adds water with No. 220 emery papers and roughly grinds 1/3 place to the resistance width on muller;
Step S240 adds the water fine grinding with 300,600, No. 800 emery papers respectively on muller, every number sand paper approximately ground 10-15 minute;
Step S245 adds suitable polishing fluid on polishing cloth, the sample preparation section polished, and about 15 minutes of time, until sample preparation section no marking, present mirror features, finish the preparation of section sample.
Said method has been shown among Fig. 5 according to the present invention, has added the coloring agent of red, blue, yellow three kinds of colors respectively and colour (coloured) the epoxy resin section sample module the made comparison diagram when under metaloscope, observing according to the colourless epoxy resin sample preparation module of prior art.Can see that the section definition effect is widely different between each layer of section sample structure.
To be placed under the metaloscope by the section sample that said method is made, observe its resistance section, to analyze its failure cause.When examining under a microscope, microscopical enlargement factor can be taken pictures between 100-500 times simultaneously.
The synoptic diagram of Fig. 7 for utilizing metaloscope that surface-mount resistor section sample of the present invention is observed according to the present invention.
As shown in Figure 7, by metaloscope 30, a red surface-mount resistor section sample B is carried out section observe.Section sample B is placed on the microscope stage 31, is positioned at the below in micro objective.Below objective table 31, promptly the back side of section sample module increases an annular backlight 32 in addition, forms backlight 33.After adding backlight 33, observed profile image has significant colour contrast from metaloscope 30, makes image more clear and attractive in appearance.Can also suitably weaken the intensity of metaloscope 30 front incident lights 34 during observation, after light weakens, surface reflection reduces, make the interface between the inner layers of material of section more clear, during adjusting, also can regulate the back surface incident light intensity simultaneously, the interface between the inner layers of material of section reach the most clear till.
Fig. 8,9,10 shows respectively and utilizes this method to observe profile image red, blue and that yellow surface-mount resistor section sample obtains.
As shown in Figure 8; boundary between the matrix 22 that resistance protection film 22 and red epoxy resin are made is perfectly clear; and the interface between they and silver-colored palladium conduction band layer 5, nickel coating 8, silver slurry layer 7b and the tin lead layer 9 etc. is also very clear, is suitable for surface resistance carried out corresponding failure analysis etc.Each layer structure is also more clear in the section among Fig. 9 and Figure 10.In conjunction with Fig. 4, by comparison, adopt the effect of the surface-mount resistor section sample that red epoxy resin makes best, its section microtexture and termination electrode (silver-colored palladium conduction band layer 6) are very clear with the interface of diaphragm 4.Adopt section effect blue, the sample preparation of yellow epoxy resin surface-mount resistor better.Adopt the section effect of colourless epoxy resin surface-mount resistor sample preparation (aging method) the poorest.
In sum, the new surface-mount resistor section sample of producing according to the present invention can obtain very high section sharpness by observational technique of the present invention, has greatly improved measurement, observation and analysis level.Colour epoxy resin module with the new method preparation remains transparent, and it has kept the advantage of original method, and the new method sample preparation is simple, and cost is low, and is easy and simple to handle, and fine promotional value is arranged.
Claims (11)
1. sticking-element section sample, described sticking-element is embedded in the transparent base, and a side section of described sticking-element is concordant with a surface of described matrix, it is characterized in that described matrix is the colored transparent shape.
2. sticking-element section sample according to claim 1 is characterized in that, described matrix is an epoxy resin.
3. sticking-element section sample according to claim 1 is characterized in that, described sticking-element is a surface-mount resistor.
4. the method for making of a sticking-element section sample comprises the steps:
Sticking-element is placed in the mould;
Matrix material is packed in the mould, make it surround described sticking-element and solidify;
The matrix and the sticking-element that combine after solidifying are taken out, and the processing sticking-element section, make a side section of described sticking-element concordant with a surface of described matrix, form described sticking-element section sample,
It is characterized in that the matrix of wherein said matrix adopting colored transparent shape.
5. the method for making of sticking-element section sample according to claim 4, it is characterized in that, described matrix material is colourless epoxy resin, before described mould that described colourless epoxy resin is packed into, earlier it is mixed with hardening agent, and adding coloring agent, stir, then it is poured into the described mould of putting into described sticking-element.
6. the method for making of sticking-element section sample according to claim 4 is characterized in that, described sticking-element is a surface-mount resistor.
7. the observational technique of a sticking-element section sample, described sticking-element section sample comprises sticking-element and transparent base, described sticking-element is embedded in the transparent base, and a side section of described sticking-element is concordant with a surface of described matrix, and described observational technique comprises:
Sticking-element section sample is placed on microscopically;
By the section of the described sticking-element of microscopic examination,
It is characterized in that, when observing described sticking-element section, provide back surface incident light at the back side of described sample preparation.
8. the observational technique of sticking-element section sample according to claim 7, it is characterized in that, when observing described sticking-element section, provide the front incident light in described sample preparation front, and the relative intensity of regulating front incident light and back surface incident light, with the clear interface that shows inner each layer structure of described sticking-element section.
9. the observational technique of sticking-element section sample according to claim 8 is characterized in that, only a backlight provides described back surface incident by being provided with on microscope.
10. the observational technique of sticking-element section sample according to claim 9 is characterized in that, described backlight ringwise.
11. the observational technique according to each described sticking-element section sample among the claim 7-10 is characterized in that described matrix is the colored transparent shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510033194 CN1815163A (en) | 2005-02-04 | 2005-02-04 | Sticking-element section sample, its making method and viewing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510033194 CN1815163A (en) | 2005-02-04 | 2005-02-04 | Sticking-element section sample, its making method and viewing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539209A (en) * | 2012-01-04 | 2012-07-04 | 肇庆理士电源技术有限公司 | Device for casting metallographic observation sample and application method thereof |
| CN103029047A (en) * | 2012-12-06 | 2013-04-10 | 苏州远东砂轮有限公司 | Method for manufacturing cross section of coated abrasive tool |
| CN103196720A (en) * | 2013-03-19 | 2013-07-10 | 武汉钢铁(集团)公司 | Preparation method of a sample with rust layer for in-situ observation of transmission electron microscope |
| CN108318304A (en) * | 2018-01-31 | 2018-07-24 | 中国空间技术研究院 | A kind of the aerospace preparation of PCBA effective sections and damage detecting method |
| CN112280250A (en) * | 2020-10-30 | 2021-01-29 | 国电锅炉压力容器检验有限公司 | Metallographic replica material, preparation method and replica process thereof |
-
2005
- 2005-02-04 CN CN 200510033194 patent/CN1815163A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539209A (en) * | 2012-01-04 | 2012-07-04 | 肇庆理士电源技术有限公司 | Device for casting metallographic observation sample and application method thereof |
| CN103029047A (en) * | 2012-12-06 | 2013-04-10 | 苏州远东砂轮有限公司 | Method for manufacturing cross section of coated abrasive tool |
| CN103029047B (en) * | 2012-12-06 | 2016-03-02 | 苏州远东砂轮有限公司 | A kind of manufacture method of coated abrasive tool cross section |
| CN103196720A (en) * | 2013-03-19 | 2013-07-10 | 武汉钢铁(集团)公司 | Preparation method of a sample with rust layer for in-situ observation of transmission electron microscope |
| CN103196720B (en) * | 2013-03-19 | 2015-07-01 | 武汉钢铁(集团)公司 | Preparation method of a sample with rust layer for in-situ observation of transmission electron microscope |
| CN108318304A (en) * | 2018-01-31 | 2018-07-24 | 中国空间技术研究院 | A kind of the aerospace preparation of PCBA effective sections and damage detecting method |
| CN112280250A (en) * | 2020-10-30 | 2021-01-29 | 国电锅炉压力容器检验有限公司 | Metallographic replica material, preparation method and replica process thereof |
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