CN207197936U - A kind of stretching device for testing heterogeneous interface slabbing - Google Patents

Abstract

The utility model discloses a kind of stretching device for testing heterogeneous interface slabbing, described device includes fixed girder, short support bar, draw money on credit strut, tensile part, loading blocks and load bar, this installation cost is low, practicality is good, extension test of the narrow sample in the case of without interfacial delamination containing heterogeneous interface can be achieved, acquired obtained stretching mechanic characteristic curve can exact representation heterogeneous interface slabbing destroy from interfacial delamination germinating to interfacial delamination expansion process, this device combination lever principle can help the extension test of the bigger tensile force of small-range test equipment realization, breach the limitation of high-precision small-range stretcher testing range.

Description

A kind of stretching device for testing heterogeneous interface slabbing

Technical field

Material experiment mechanics field is the utility model is related to, more particularly to a kind of stretching dress for testing heterogeneous interface slabbing Put.

Background technology

As micro-electron packaging device is towards miniaturization and the development of multifunction, the requirement to packaging reliability Increasingly improve, micro-electron packaging device is being produced with meeting during normal use by external environment condition such as temperature-humidity, mechanical load Effect with the factor such as chemical contamination and fail, most common of which failure mode is the failure of package interface slabbing, development for this The theory and experimental study of package interface slabbing are most important to improving packaging reliability.It is general to assess package interface intensity Experimental test procedures include double cantilever beam pulling method, shearing experiment method, mixed mode crooked experiment method etc..In traditional encapsulation , often will be to the interface pre-existing crack to be measured of experiment test sample, to ensure Interface Crack from stress in interfacial delamination test Unusual pre-existing crack tip starts to extend, so as to obtain the mechanics characteristic curve of interfacial delamination extension to assess boundary strength, But the existing defects by way of to the preset Interface Crack of test sample and then progress extension test, because preset interface is split The presence of line causes test to start the preceding interface to testing sample and resulted in damage, and the boundary strength for testing to obtain is often below The actual tensile strength of interface in itself, the mechanics characteristic curve for testing to obtain can not characterize the process of interfacial delamination germinating, and In conventional test, wider bar samples are made in test sample mostly, and carry out extension test using Traditional stretching equipment, Obtained stress strain curve is unsmooth, can not characterize the heterogeneous interface spallation process in elcetronic package structure very well.

Utility model content

The purpose of this utility model be in view of the shortcomings of the prior art, and provide it is a kind of test heterogeneous interface slabbing stretching Device.This installation cost is low, practicality is good, drawing of the narrow sample in the case of without interfacial delamination containing heterogeneous interface can be achieved Stretch test, acquired obtained stretching mechanic characteristic curve can exact representation heterogeneous interface slabbing destroy from interfacial delamination germinating to Interfacial delamination expansion process, this device combination lever principle can help the stretching of the bigger tensile force of small-range test equipment realization Test, breaches the limitation of high-precision small-range stretcher testing range.

Realizing the technical scheme of the utility model purpose is：

A kind of stretching device for testing heterogeneous interface slabbing, including

Fixed girder, the fixed girder is of a lateral H shape, and the entablature that " work " shape fixes girder is consolidated with tensile test apparatus Connect, the sill that " work " shape fixes girder is divided into the first strip shape body and the second strip shape body by vertical beam；

Short support bar, upper end and the first strip shape body of the short support bar are that slidingtype is connected, and short support bar is at first Position on shape body is fixed after determining；

Draw money on credit strut, the upper end of the strut of drawing money on credit and the second strip shape body are that slidingtype is connected, and strut of drawing money on credit is in Article 2 Position on shape body is fixed after determining；

Tensile part, the tensile part include upper tensile part and lower tensile part, and upper tensile part includes upper stretching Bar and upper stretch rod both ends connection first on slide plate and first time slide plate；Lower tensile part includes lower stretch rod and lower stretch rod Slide plate and second time slide plate on the second of both ends connection；Slide plate and the first strip shape body or the second strip shape body slidingtype connect on first Connect；

Loading blocks, the loading blocks include the first loading blocks and the second loading blocks；First loading blocks can with first time slide plate It is detachably connected with, slide plate detachable connection in the second loading blocks and second；

Load bar, one end of the load bar are hinged through the lower end of second time slide plate and strut of drawing money on credit.

The load bar is provided with equidistant groove groove, and the fixation of slide plate during extension test is improved by groove groove Effect, prevent to slide.

During test sample, fixed girder is fixed on tensile test apparatus, and one end of test sample and short support bar are affixed, The other end of test sample is fixed between the first loading blocks and the second loading blocks.

Using the heterogeneous interface slabbing method of testing of above-mentioned stretching device, comprise the following steps：

1）Prepare sample：By materials at two layers above and below test sample respectively with two loading blocks are affixed is connected together, so as to survey It is fast between the second loading soon that one end of test agent is fixed on the first loading；

2）Adjust support bar：According to the position of the size of test sample, the short support bar of length adjustment on the first strip shape body With strut of drawing money on credit in the position of the second strip shape body, and fix；

3）Load test sample：The other end of test sample and support bar is affixed, connect loading using tensile part Block and fixed girder and load bar, the length of stretch rod is can adjust in connection procedure, ensures that testing sample and load bar are being surveyed Horizontality is in before examination；

4）Test：Stretching device is fixed on tensile test apparatus, the loading component of stretcher applies tensile force In the loading zone of load bar, slabbing is germinated and is extended since testing sample heterogeneous interface leading portion, pass through stretcher data Collection terminal is the mechanics characteristic curve that can obtain the germinating of heterogeneous interface slabbing and then extend；

5）Calculate data：To step 1）- step 4）Test obtained mechanics characteristic curve Data Processing in Experiment and combine disconnected Split mechanics and cohesive zone model is theoretical, the interfacial delamination germinating being calculated by numbered analog simulation and the stress of expansion process Change, so as to obtain the germinating of heterogeneous interface slabbing and extend required actual tensile strength.

Between testing sample requires to ensure the heterogeneous interface of sample in manufacturing process, the particularly heterogeneous interface of print front end Flawless is present, with ensure to characterize during extension test be interfacial delamination germinating and extension process, surveyed to obtain stretching The more smooth stress strain curve of examination process, and also to ensure spallation process of the heterogeneous interface test sample in drawing process Random crack is not produced, testing sample makes narrow strip.

Slide plate region on one end of load bar to load bar is the loading area of stretching experiment, and tensile force is loaded on into this The diverse location in region, the different lever amplification effects to testing sample tensile force can be achieved, i.e., stretcher in actual measurement Less power is provided, the enhancing amplification effect of tensile force can be realized by this stretching device；Can be quick by equidistant groove The distance between slide plate on load(ing) point and stretch rod is determined, in order to quickly calculate the size of lever force amplification.

This installation cost is low, practicality is good, the narrow sample containing heterogeneous interface can be achieved in the case of without interfacial delamination Extension test, acquired obtained stretching mechanic characteristic curve can exact representation heterogeneous interface slabbing destroy sprouted from interfacial delamination Raw to arrive interfacial delamination expansion process, this device combination lever principle can help small-range test equipment to realize bigger tensile force Extension test, breach the limitation of high-precision small-range stretcher testing range.

Brief description of the drawings

Fig. 1 is that structural representation of the stretching device of heterogeneous interface slabbing in test mode is tested in embodiment；

The structural representation of load bar in Fig. 2 embodiments；

In figure, 1. fix slide plate 3. on girder 1-1. the first strip shape body 1-2. the second strip shape body 1-3. vertical beams 2. first First fastening nail 4. draw money on credit the latch 6. second of strut 5. fastening nail 7. short support bars 8. on the first time slide plate of stretch rod 9. 10. the load bar 16. of 14. times stretch rods of slide plate 15. in the loading blocks 13. second of 11. test sample of the first loading blocks 12. second Two times slide plates.

Embodiment

The utility model content is further elaborated with reference to the accompanying drawings and examples, but is not to the utility model Restriction.

Embodiment：

Reference picture 1, Fig. 2, a kind of stretching device for testing heterogeneous interface slabbing, including fixed girder 1, the fixed girder 1 is of a lateral H shape, and the entablature and tensile test apparatus of " work " shape fixation girder 1 are affixed, and " work " shape fixes the sill quilt of girder 1 1-3 points of vertical beam is the first strip shape body 1-1 and the second strip shape body 1-2；

Short support bar 7, upper end and the first strip shape body 1-1 of the short support bar 7 are that slidingtype is connected, and short support bar 7 exists 6 are followed closely by the second fastening after determining and fixed in position on first strip shape body 1-1；

Draw money on credit strut 4, the upper end of the strut 4 of drawing money on credit and the second strip shape body 1-2 are that slidingtype is connected, and strut 4 of drawing money on credit exists 3 are followed closely by the first fastening after determining and fixed in position on second strip shape body 1-2；

Tensile part, the tensile part include upper tensile part and lower tensile part, and upper tensile part includes upper stretching Bar 8 and the both ends of upper stretch rod 8 connection first on slide plate 2 and first time slide plate 9；Lower tensile part include lower stretch rod 14 and under Slide plate 13 and second time slide plate 16 on the second of the both ends of stretch rod 14 connection；The strip shape body 1-1 of slide plate 2 and first or on first Two strip shape body 1-2 slidingtypes connect；

Loading blocks, the loading blocks include the first loading blocks 10 and the second loading blocks 12；Under first loading blocks 10 and first The detachable connection of slide plate 9, the detachable connection of slide plate 13 in the second loading blocks 12 and second；

Load bar 15, one end of the load bar 15 pass through latch 5 through the lower end of second time slide plate 16 and strut 4 of drawing money on credit It is be hinged；

The load bar 15 is provided with equidistant groove groove, and slide plate is consolidated during improving extension test by groove groove Determine effect, prevent to slide.

During test sample 11, fixed girder 1 is fixed on tensile test apparatus, one end of test sample 11 and short support bar 7 is affixed, and the other end of test sample is fixed between the first loading blocks 10 and the second loading blocks 12.

Using the heterogeneous interface slabbing method of testing of above-mentioned stretching device, comprise the following steps：

1）Prepare sample：By test sample 11 with loading blocks are affixed is connected together, one end of test sample two layers of material up and down Material is affixed with two loading blocks respectively, so as to which one end of test sample 11 is fixed on the loading of the first loading fast 10 and second fast 12 Between；

2）Adjust support bar：According to the size of test sample 11, the short support bar 7 of length adjustment on the first strip shape body 1-1 Position and strut 4 of drawing money on credit in the second strip shape body 1-2 position, it is and fixed；

3）Load test sample 11：The other end of test sample 11 and support bar 7 is affixed, connected using tensile part Loading blocks and fixed girder and load bar, the length of stretch rod is can adjust in connection procedure, ensures testing sample 11 and loading Bar 15 is in horizontality before testing；

4）Test：Stretching device is fixed on tensile test apparatus, the loading component of stretcher will stretch tensile force The loading zone of load bar 15 is applied to, slabbing is germinated and is extended since the heterogeneous interface leading portion of testing sample 11, passes through stretching The number collection terminal of equipment is the mechanics characteristic curve that can obtain the germinating of heterogeneous interface slabbing and then extend；

5）Calculate data：To step 1）- step 4）Test obtained mechanics characteristic curve Data Processing in Experiment and combine disconnected Split mechanics and cohesive zone model is theoretical, the interfacial delamination germinating being calculated by numbered analog simulation and the stress of expansion process Change, so as to obtain the germinating of heterogeneous interface slabbing and extend required actual tensile strength.

Between testing sample 11 requires to ensure the heterogeneous interface of sample in manufacturing process, the particularly heterogeneous boundary of print front end Face flawless is present, to ensure that what is characterized during extension test is the process of interfacial delamination germinating and extension, to be stretched The more smooth stress strain curve of test process, and also to ensure slabbing mistake of the heterogeneous interface test sample in drawing process Journey does not produce random crack, and testing sample makes narrow strip.

Slide plate region on one end of load bar 15 to load bar is the loading area of stretching experiment, and tensile load is applied Diverse location in the region, the different lever amplification effects to testing sample tensile force can be achieved, i.e., stretched in actual measurement Equipment provides less power, and the enhancing amplification effect of tensile force can be realized by this stretching device；Can be with by equidistant groove The quick distance determined on load(ing) point and stretch rod between slide plate, in order to quickly calculate the size of lever force amplification.

This example test sample 11 includes epoxy molding compound and copper metal substrate two layers of dissimilar materials up and down, and two layers heterogeneous Material is bonded together by traditional mould plastic package process, so as to form heterogeneous interface between two layers of dissimilar materials.

Claims (2)

1. a kind of stretching device for testing heterogeneous interface slabbing, it is characterized in that, including

Fixed girder, the fixed girder is of a lateral H shape, and the sill that " work " shape fixes girder is divided into the first strip shape body by vertical beam With the second strip shape body；

Short support bar, upper end and the first strip shape body of the short support bar are that slidingtype is connected；

Draw money on credit strut, the upper end of the strut of drawing money on credit and the second strip shape body are that slidingtype is connected；

Tensile part, the tensile part include upper tensile part and lower tensile part, upper tensile part include upper stretch rod and Slide plate and first time slide plate on the first of upper stretch rod both ends connection；Lower tensile part includes lower stretch rod and lower stretch rod both ends Slide plate and second time slide plate on the second of connection；Slide plate is connected with the first strip shape body or the second strip shape body slidingtype on first；

Loading blocks, the loading blocks include the first loading blocks and the second loading blocks；First loading blocks and first time slide plate are detachable Formula connects, slide plate detachable connection in the second loading blocks and second；

Load bar, one end of the load bar are hinged through the lower end of second time slide plate and strut of drawing money on credit.

2. the stretching device of test heterogeneous interface slabbing according to claim 1, it is characterized in that, the load bar is provided with etc. Away from groove groove.