WO2011028107A1 - Improvements to high force die shear tooling - Google Patents
Improvements to high force die shear tooling Download PDFInfo
- Publication number
- WO2011028107A1 WO2011028107A1 PCT/NL2010/050545 NL2010050545W WO2011028107A1 WO 2011028107 A1 WO2011028107 A1 WO 2011028107A1 NL 2010050545 W NL2010050545 W NL 2010050545W WO 2011028107 A1 WO2011028107 A1 WO 2011028107A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shear
- die
- block
- shaft
- substrate
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01005—Boron [B]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01006—Carbon [C]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01013—Aluminum [Al]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/013—Alloys
- H01L2924/014—Solder alloys
Abstract
A test device for shear testing semiconductor die (2) bonded to a substrate (1). Shear block (7) being self aligning and made from a soft material to minimise stresses on the die caused by the test load thereby reducing or eliminating any damage to the die. Different block designs can be made to suit different applications, shear face (12) being tailored to test either single die, die placed very closely to each other or stacked die. The depth of shear face (12) may be less than the die thickness ensuring that the bond surface is not damaged by block (7) during the test.
Description
IMPROVEMENTS TO HIGH FORCE DIE SHEAR TOOLING
This invention is for tooling to perform a shear test on a semiconductor die fixed to a substrate. Various forms of this type of test are known but problems can occur when testing at high forces. High forces being above about 20kgf. The invention is not limited to such "high forces" and may also be used with its advantages at any force.
Semiconductor die mounted to substrates are known. The die is fixed to the substrate by many different methods. Typical examples are solder, adhesive or a matrix of solder balls. Most if not all fixing methods are known to the skilled person. The size and shape of the die and substrate also come in many different forms all of which could be compatible with the invention. Generally the die are square or rectangular with a largest dimension in the range of 0.05mm to 40mm but the invention is not limited to this. The substrate can be a similar size to the die or many times larger. Both the die and the substrate are typically, substantially planer.
The shear test is performed to measure the quality of the bond. The test can be to the destruction of the bond or none destruct. The die material is typically hard and brittle. A common material being silicon. The bond is tested by clamping the substrate and applying a shear load to one side of the die. This produces high stresses at the clamp and load application points. The invention enables these stresses to be minimised by maintaining good alignment and distributing the test load on the substrate and die.
Figures prefixed A
Features of the invention will be apparent from the following description of a preferred embodiment and reference to the accompanying drawing in which,
Fig Al illustrates an isometric typical substrate and die
Fig A2 illustrates an isometric view of a preferred embodiment of the invention
Fig A3 illustrates sectional side view of a preferred embodiment of the invention Fig Al illustrates a typical substrate 1 onto which is fixed die 2.
Fig A2 illustrates the substrate and die under test by a preferred embodiment of the invention. Fig A3 is the same as Fig A2 but as a sectional side elevation. The substrate and die are placed on to base 3 of the tooling, one edge of the substrate being pushed into contact with the undercut face of block 4. Block 4 is rigidly fixed to base 1. In a preferred embodiment this would be by a plurality of fixing screws 5. The substrate is then clamped to the base. In a preferred embodiment this would be by fixing screws 6 but many other methods know to the skilled person could be used. In another preferred embodiment the clamping would be by a quick release toggle mechanism. Shear block 7 is placed on the opposite side of the die as illustrated. Shear tool 8 is fixed to the load cell of a "Bond Tester". A "Bond Tester" being known to the skilled person can apply a load in the direction of arrow 9. In a preferred embodiment shear tool 8 is cylindrical with a reduce end that is a clearance 110 fit in a hole in the shear block 7. The length of the reduce end of the shear tool is slightly less than the thickness of the shear bock to enable clearance 111 such that the shear tool does not touch the substrate. The step between the two different diameters of the shear tool 8 is brought into contact with the top of shear block 7 and then raised to form clearance 112. In a preferred embodiment clearance 112 is less
than clearance 111. Clearance 112 might typically be 5μιη to ΙΟΟμιη and clearance 111, ΙΟμιη to 500μιη. When aligned as described and illustrated the shear tool applies the test shear load to the die in the direction of arrow 9.
Advantages of the invention are,
Shear block 7 is free to rotate about the cylindrical axis of the shear tool such that it contacts the full surface of the edge of the die.
Shear block 7 can be a wear component and made from a relatively compliant material such that it locally deforms where it is in contact with the die further maximising its contact area with the die and thereby reducing the contact stress. In a preferred embodiment shear block 7 has an undercut 12 around one or more faces to minimise any lifting of the die from the substrate during a test. The shear block is likely to wear and each of the undercuts may be used before a new shear block is required. Shear faces may also be arranged on the top and bottom (top and bottom as drawn in the figures) of the block further increasing its life before a new block is required.
Clearance 111 results in the end of the shear tool being clear of the substrate but to be sufficiently aligned with the edge of the die so that the shear load is applied with a minimum tipping moment of the shear block.
Clearance 112 can be controlled by the bond tester as a means of thereby controlling clearance 111. Description for filling GB1000758.1 "High Force, Stacked and Tight Access Die Shear Tooling"
Figures prefix B
These embodiments of the invention have advantages when testing high force, stacked or tight access die applications. They may be use in any one of these cases or any multiple 80 combinations of them. Die are often thin (0.025mm to 1.0mm) and so applying the shear test load to this thin edge also presents difficulties. Die are also stacked on top of each other or mounted "side by side" making access for load application difficult.
Features of these embodiments of the invention will be apparent from the following 85 description of a preferred embodiment and reference to the accompanying drawing in which,
Fig B 1 illustrates an isometric view of a typical substrate and single die
Fig B2 illustrates an isometric view of a typical substrate with two die attached making access tight
90 Fig B3 illustrates an isometric view of a typical substrate with two stacked die
Fig B4 illustrates an isometric view of a preferred embodiment of the invention
Fig B5 illustrates side and sectional view of a preferred embodiment of the invention Fig B6 illustrates side view of a preferred embodiment of the invention testing a substrate with a single die
95 Fig B7 illustrates side view of a preferred embodiment of the invention testing a tight access application
Fig B8 & B9 illustrate side views of a preferred embodiment of the invention testing stacked die applications
100 Figs Bl, B2 and B3 illustrate typical substrates 1 onto which dies 2 are fixed.
Fig B4 illustrates the substrate and die under test by a preferred embodiment of the
invention in a tight access application. Fig B5 is a similar illustration but as a side and sectional elevation. The substrate and die are placed on to base 3 of the tooling, one edge
105 of the substrate being pushed into contact with the undercut face of block 4. Block 4 is rigidly fixed to base 3. The substrate is then clamped to the base. In a preferred embodiment this would be by spring pressure and the undercut in the block at point 5 but many other methods know to the skilled person could be used. In another preferred embodiment the clamping would be by a quick release toggle mechanism.
110 Shear block 7 is placed on the opposite side of the die as illustrated. Shear tool 8 is fixed to the load cell of a "Bond Tester". A "Bond Tester" being known to the skilled person can apply a load in the direction of arrow 9. Shear block 7 is held on the end of shear tool 8 by a vacuum which is ported via holes 10 in the shear tool. Pin 11 mounted to the shear tool is in clearance with the shear block but controls it so that the shear block cannot rotate
115 more than about +/- 5 degrees thus ensuring that the block is fitted in its correct nominal orientation.
To test a die the shear block is lowered on to the top face of the die as illustrated in Figs B6 to B9. The shear face 12 of the shear block being aligned to the side of the die with a slight clearance. The contact between the top of the die and underside of the shear block
120 may then be controlled to a specific force or subsequently raised a "step back" distance as know to the skilled person. The shear load can then be applied by the shear tool moving in direction 9. When the shear contact surface 12 of the shear block touches the die the shear block is able to rotate on the shear tool until the contact surface is parallel to the edge of the die. This ensures the contact is distributed over the full surface of the contact edge on
125 the die, thereby minimising stress concentrations.
Advantages of these embodiments of the invention are,
Shear block 7 is held on to shear tool 8 by vacuum suction
Shear block 7 has one or more contact faces that can be used to shear a die. When one side is worn the other may be used.
The shear faces on shear block 7 may be manufactured so that they are close to each other enabling them to be inserted into a tight space between the die to be tested and any other component mounted on the same substrate.
The shear faces on shear block 7 may be manufactured such that they protrude less from the under surface of the shear block than the thickness of the die. This ensures that the shear block cannot come into contact with the substrate and/or bond between the die and substrate during alignment and the shear test.
In a preferred embodiment the shear faces on the shear block are substantially close to the centre line of the shear tool spindle. This enables maximum alignment between the faces and the die before and during the test and minimises misalignment caused by test load deformations in the system.
145
Description for filling GB1005268.6 "Improvements to High Force, Stacked and Tight Access Die Shear Tooling"
Figures prefix C
150 Features of these embodiments of the invention will be apparent from the following description of preferred embodiments and reference to the accompanying drawing in which,
Fig CIO illustrates an isometric view of an alternative embodiment of the invention
Fig C 11 illustrates side and sectional view of the alternative embodiment of the invention
155
Advantages of the invention are,
Figures CIO and Cl l illustrate an alternative embodiment where the vacuum holding block 7 on to the tool is arranged to be on the top surface of the block. This embodiment has all the advantages of the previously described embodiments 160 but also enables the hole in the block to go through it, as illustrated in Figure Cl l .
This design allows the tool 8 to descend below the top surface of the die and thereby minimising the bending moment on the block caused by the shear load it applies to the die.
Shear face 12 is raised above the substrate 1 surface by undercut 13. This controls 165 the shear height of the shear face above the substrate by the height of the undercut, thereby ensuring when the bond breaks its surface is not damage by the block and its failure mode can be inspected.
Claims
1. A method for shear testing the bond between a semiconductor die and a substrate by a square or rectangular shear block that has a bearing in it that runs on the end of a shear tool shaft of a Bond Tester, said block being free to rotate on the shaft and held in place by the bearing and/or vacuum suction applied through the shaft.
2. A block according to claim 1 with one or more shear faces used to test the die.
3. A block according to claim 1 where the bearing is a plain cylindrical hole.
4. A shear testing method according to any one or more of the preceding claims where the bearing allows the block to rotate on the tool shaft so that a shear face on the block can self align into maximum contact with the die.
5. A shear block according to any one or more of the preceding claims which is made from a material which is softer than the die allowing some deformation of the block at the contact points reducing the test stress on the die at the contact points reducing or eliminating any damage to the die at the point of load application.
6. A shear block according to any one or more of the preceding claims which is made of a durable material to minimise the wear at its contact points with the die.
7. A shear block according to any one or more of the preceding claims with a square or rectangular protrusion on the underside of the block with one or more shear faces.
8. A shear block according the claim 7 where the protrusion is designed to fit in the gap between two closely placed die.
9. A shear block according to claim 7 or 8 where the height of the protrusion is less than the thickness of the die.
10. A shear testing method according to any one or more of the preceding claims where the vacuum supporting the block is supplied either through the end of the tool shaft or trough an annular channel on the side of the shaft and to the top of the block.
11. A shear block and shaft according to any one or more of the preceding claims where the shaft extends through the bearing such that its lower end is lower than the top of the die.
12. A shear block according to any one or more of the preceding claims where the shear face is an undercut in the block.
13. A shear block according to any one or more of the preceding claims where the shear face is raised above the substrate, to control the shear height, by an undercut.
14. A shear block and bearing according to any one or more of the preceding claims where the amount of rotation is limited by a pin mounted to the shaft.
15. A shear block according to any one or more of the preceding claims with one or multiple shear faces on either its bottom and/or its top surfaces.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201080049812.5A CN102770747B (en) | 2009-09-03 | 2010-08-31 | The improvement of high intensity chip shearing test instrument |
EP10763885.0A EP2473832B1 (en) | 2009-09-03 | 2010-08-31 | Improvements to high force die shear tooling |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0915294.3 | 2009-09-03 | ||
GB0915294A GB0915294D0 (en) | 2009-09-03 | 2009-09-03 | High force die shear tooling |
GB1000758.1 | 2010-01-18 | ||
GBGB1000758.1A GB201000758D0 (en) | 2010-01-18 | 2010-01-18 | High force,stacked and tight access die shear tooling |
GB1005268.6 | 2010-03-30 | ||
GBGB1005268.6A GB201005268D0 (en) | 2010-03-30 | 2010-03-30 | Improvements to high force and tight access die shear tooling |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011028107A1 true WO2011028107A1 (en) | 2011-03-10 |
Family
ID=43499833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL2010/050545 WO2011028107A1 (en) | 2009-09-03 | 2010-08-31 | Improvements to high force die shear tooling |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2473832B1 (en) |
CN (1) | CN102770747B (en) |
WO (1) | WO2011028107A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111426554A (en) * | 2020-03-23 | 2020-07-17 | 天津大学 | Semiconductor chip high temperature shear test anchor clamps |
Families Citing this family (7)
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NL2021048B1 (en) * | 2018-06-04 | 2019-12-11 | Xyztec B V | Improvements to Step back Height |
CN109374439B (en) * | 2018-10-23 | 2021-04-13 | 北京航天时代光电科技有限公司 | Y waveguide integrated optical device chip shearing test tool and shearing method |
CN111208018A (en) * | 2020-01-10 | 2020-05-29 | 长江存储科技有限责任公司 | Detection method and detection device for semiconductor structure |
CN111289386B (en) * | 2020-03-09 | 2023-04-14 | 中国电子产品可靠性与环境试验研究所((工业和信息化部电子第五研究所)(中国赛宝实验室)) | Device and method for testing wafer bonding shear strength |
CN112179731B (en) * | 2020-09-17 | 2021-11-12 | 长江存储科技有限责任公司 | Sample preparation method, stress detection method and sample to be detected |
CN113092363A (en) * | 2021-03-24 | 2021-07-09 | 深圳市德瑞茵精密科技有限公司 | Testing device and method for detecting bonding strength of semiconductor device |
CN113390732B (en) * | 2021-07-08 | 2023-07-04 | 深圳市德瑞茵精密科技有限公司 | High thrust solder joint intensity shearing force testing arrangement |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6475938A (en) * | 1987-09-18 | 1989-03-22 | Hitachi Ltd | Apparatus for testing bonding strength of film |
US5767414A (en) * | 1997-03-05 | 1998-06-16 | Mitsubishi Semiconductor America, Inc. | Automatically aligning tool for uniformly applying a controlled force to an object |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3834718B2 (en) * | 2001-12-26 | 2006-10-18 | ダイプラ・ウィンテス株式会社 | Coating strength / shear strength measuring device |
JP2005265806A (en) * | 2004-03-22 | 2005-09-29 | Shimadzu Corp | Fixture for shearing test |
CN2779379Y (en) * | 2004-12-24 | 2006-05-10 | 西北工业大学 | Test fixture for shear intensity of joint |
CN201172301Y (en) * | 2008-03-04 | 2008-12-31 | 利达光电股份有限公司 | Positioning cramp for silk-screen printing for abnormity optical parts |
-
2010
- 2010-08-31 WO PCT/NL2010/050545 patent/WO2011028107A1/en active Application Filing
- 2010-08-31 EP EP10763885.0A patent/EP2473832B1/en active Active
- 2010-08-31 CN CN201080049812.5A patent/CN102770747B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6475938A (en) * | 1987-09-18 | 1989-03-22 | Hitachi Ltd | Apparatus for testing bonding strength of film |
US5767414A (en) * | 1997-03-05 | 1998-06-16 | Mitsubishi Semiconductor America, Inc. | Automatically aligning tool for uniformly applying a controlled force to an object |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111426554A (en) * | 2020-03-23 | 2020-07-17 | 天津大学 | Semiconductor chip high temperature shear test anchor clamps |
CN111426554B (en) * | 2020-03-23 | 2021-10-08 | 天津大学 | Semiconductor chip high temperature shear test anchor clamps |
Also Published As
Publication number | Publication date |
---|---|
EP2473832A1 (en) | 2012-07-11 |
CN102770747B (en) | 2016-06-08 |
CN102770747A (en) | 2012-11-07 |
EP2473832B1 (en) | 2015-11-04 |
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