薄膜资料(Thin film Material)连续送第一部分!

xx_912 · 发表于 2006-3-11 00:14:32

目录部分:
Contents
page xiii
Preface xv
1 Introduction and Overview 1
1.1 A classi¯cation of thin ¯lm con¯gurations 3
1.2 Film deposition methods 6
1.2.1 Physical vapor deposition 7
1.2.2 Chemical vapor deposition 10
1.2.3 Thermal spray deposition 12
1.2.4 Example: Thermal barrier coatings 14
1.3 Modes of ¯lm growth by vapor deposition 17
1.3.1 From vapor to adatoms 17
1.3.2 From adatoms to ¯lm growth 19
1.3.3 Energy density of a free surface or an interface 22
1.3.4 Surface stress 27
1.3.5 Growth modes based on surface energies 30
1.4 Film microstructures 33
1.4.1 Epitaxial ¯lms 34
1.4.2 Example: Vertical-cavity surface-emitting lasers 43
1.4.3 Polycrystalline ¯lms 44
1.4.4 Example: Films for magnetic storage media 50
1.5 Processing of microelectronic structures 52
1.5.1 Lithography 53
1.5.2 The damascene process for copper interconnects 54
1.6 Processing of MEMS structures 57
1.6.1 Bulk micromachining 57
1.6.2 Surface micromachining 59
1.6.3 Molding processes 60
iv
Contents v
1.6.4 NEMS structures 62
1.6.5 Example: Vibrating beam bacterium detector 64
1.7 Origins of ¯lm stress 65
1.7.1 Classi¯cation of ¯lm stress 66
1.7.2 Stress in epitaxial ¯lms 68
1.8 Growth stress in polycrystalline ¯lms 69
1.8.1 Compressive stress prior to island coalescence 71
1.8.2 Example: In°uence of areal coverage 74
1.8.3 Tensile stress due to island contiguity 75
1.8.4 Compressive stress during continued growth 77
1.8.5 Correlations between ¯nal stress and grain structure 78
1.8.6 Other mechanisms of stress evolution 80
1.9 Consequences of stress in ¯lms 90
1.10 Exercises 91
2 Film stress and substrate curvature 93
2.1 The Stoney formula 94
2.1.1 Example: Curvature due to epitaxial strain 99
2.1.2 Example: Curvature due to thermal strain 100
2.2 In°uence of ¯lm thickness on bilayer curvature 101
2.2.1 Substrate curvature for arbitrary ¯lm thickness 103
2.2.2 Example: Maximum thermal stress in a bilayer 110
2.2.3 Historical note on thermostatic bimetals 111
2.3 Methods for curvature measurement 113
2.3.1 Scanning laser method 115
2.3.2 Multi-beam optical stress sensor 116
2.3.3 Grid re°ection method 118
2.3.4 Coherent gradient sensor method 120
2.4 Layered and compositionally graded ¯lms 124
2.4.1 Nonuniform mismatch strain and elastic properties 126
2.4.2 Constant gradient in mismatch strain 130
2.4.3 Example: Stress in compositionally graded ¯lms 131
2.4.4 Periodic multilayer ¯lm 133
2.4.5 Example: Overall thermoelastic response of a multilayer 134
2.4.6 Multilayer ¯lm with small total thickness 136
2.4.7 Example: Stress in a thin multilayer ¯lm 137
2.5 Geometrically nonlinear deformation range 138
2.5.1 Limit to the linear range 139
2.5.2 Axially symmetric deformation in the nonlinear range 141
2.6 Bifurcation in equilibrium shape 143
vi Contents
2.6.1 Bifurcation analysis with uniform curvature 146
2.6.2 Visualization of states of uniform curvature 154
2.6.3 Bifurcation for general curvature variation 158
2.6.4 A substrate curvature deformation map 162
2.6.5 Example: A curvature map for a Cu/Si system 163
2.7 Exercises 164
3 Stress in anisotropic and patterned films 167
3.1 Elastic anisotropy 168
3.2 Elastic constants of cubic crystals 170
3.2.1 Directional variation of e®ective modulus 172
3.2.2 Isotropy as a special case 174
3.3 Elastic constants of non-cubic crystals 175
3.4 Elastic strain in layered epitaxial materials 176
3.5 Film stress for a general mismatch strain 180
3.5.1 Arbitrary orientation of the ¯lm material 181
3.5.2 Example: Cubic thin ¯lm with a (111) orientation 184
3.6 Film stress from x-ray di®raction measurement 186
3.6.1 Relationship between stress and d¡spacing 186
3.6.2 Example: Stress implied by measured d¡spacing 188
3.6.3 Stress-free d¡spacing from asymmetric di®raction 189
3.6.4 Example: Determination of reference lattice spacing 194
3.7 Substrate curvature due to anisotropic ¯lms 195
3.7.1 Anisotropic thin ¯lm on an isotropic substrate 195
3.7.2 Aligned orthotropic materials 198
3.8 Piezoelectric thin ¯lm 201
3.8.1 Mismatch strain due to an electric ¯eld 202
3.8.2 Example: Substrate curvature due to an electric ¯eld 203
3.9 Periodic array of parallel ¯lm cracks 204
3.9.1 Plane strain curvature change due to ¯lm cracks 206
3.9.2 Biaxial curvature due to ¯lm cracks 213
3.10 Periodic array of parallel lines or stripes 218
3.10.1 Biaxial curvature due to lines 218
3.10.2 Volume averaged stress in terms of curvature 224
3.10.3 Volume averaged stress in a damascene structure 227
3.11 Measurement of stress in patterned thin ¯lms 231
3.11.1 The substrate curvature method 231
3.11.2 The x-ray di®raction method 232
3.11.3 Micro-Raman spectroscopy 232
3.12 Exercises 234
Contents vii
4 Delamination and fracture 239
4.1 Stress concentration near a ¯lm edge 241
4.1.1 A membrane ¯lm 243
4.1.2 Example: An equation governing interfacial shear stress 245
4.1.3 More general descriptions of edge stress 247
4.2 Fracture mechanics concepts 252
4.2.1 Energy release rate and the Gri±th criterion 254
4.2.2 Example: Interface toughness of a laminated composite 259
4.2.3 Crack edge stress ¯elds 261
4.2.4 Phase angle of the local stress state 264
4.2.5 Driving force for interface delamination 265
4.3 Work of fracture 268
4.3.1 Characterization of interface separation behavior 269
4.3.2 E®ects of processing and interface chemistry 272
4.3.3 E®ect of local phase angle on fracture energy 276
4.3.4 Example: Fracture resistance of nacre 278
4.4 Film delamination due to residual stress 282
4.4.1 A straight delamination front 285
4.4.2 Example: Delamination due to thermal strain 287
4.4.3 An expanding circular delamination front 288
4.4.4 Phase angle of the stress concentration ¯eld 293
4.4.5 Delamination approaching a ¯lm edge 294
4.5 Methods for interface toughness measurement 297
4.5.1 Double cantilever test con¯guration 298
4.5.2 Four-point °exure beam test con¯guration 299
4.5.3 Compression test specimen con¯gurations 303
4.5.4 The superlayer test con¯guration 306
4.6 Film cracking due to residual stress 309
4.6.1 A surface crack in a ¯lm 309
4.6.2 A tunnel crack in a buried layer 317
4.6.3 An array of cracks 319
4.6.4 Example: Cracking of an epitaxial ¯lm 324
4.7 Crack de°ection at an interface 325
4.7.1 Crack de°ection out of an interface 326
4.7.2 Crack de°ection into an interface 330
4.8 Exercises 338
5 Film buckling, bulging and peeling 341
5.1 Buckling of a strip of uniform width 342
5.1.1 Post-buckling response 343
viii Contents
5.1.2 Driving force for growth of delamination 349
5.1.3 Phase angle of local stress state at interface 350
5.1.4 Limitations for elastic-plastic materials 356
5.2 Buckling of a circular patch 358
5.2.1 Post-buckling response 358
5.2.2 Example: Temperature change for buckling of a debond 363
5.2.3 Driving force for delamination 364
5.2.4 Example: Buckling of an oxide ¯lm 369
5.3 Secondary buckling 370
5.4 Experimental observations 372
5.4.1 Edge delamination 372
5.4.2 Initially circular delamination 373
5.4.3 E®ects of imperfections on buckling delamination 377
5.4.4 Example: Buckling instability of carbon ¯lms 380
5.5 Film buckling without delamination 382
5.5.1 Soft elastic substrate 383
5.5.2 Viscous substrate 385
5.5.3 Example: Buckling wavelength for a glass substrate 387
5.6 Pressurized bulge of uniform width 388
5.6.1 Small de°ection bending response 388
5.6.2 Large de°ection response 390
5.6.3 Membrane response 393
5.6.4 Mechanics of delamination 396
5.7 Circular pressurized bulge 400
5.7.1 Small de°ection bending response 401
5.7.2 Membrane response 401
5.7.3 Large de°ection response 404
5.7.4 The in°uence of residual stress 408
5.7.5 Delamination mechanics 409
5.7.6 Bulge test con¯gurations 412
5.8 Example: MEMS capacitive transducer 414
5.9 Film peeling 418
5.9.1 The driving force for delamination 418
5.9.2 Mechanics of delamination 419
5.10 Exercises 420
6 Dislocation formation in epitaxial systems 422
6.1 Dislocation mechanics concepts 423
6.1.1 Dislocation equilibrium and stability 423
6.1.2 Elastic ¯eld of a dislocation near a free surface 426
Contents ix
6.2 Critical thickness of a strained epitaxial ¯lm 432
6.2.1 The critical thickness criterion 433
6.2.2 Dependence of critical thickness on mismatch strain 436
6.2.3 Example: Critical thickness of a SiGe ¯lm on Si(001) 438
6.2.4 Experimental results for critical thickness 439
6.2.5 Example: In°uence of crystallographic orientation on hcr 441
6.3 The isolated threading dislocation 443
6.3.1 Condition for advance of a threading dislocation 444
6.3.2 Limitations of the critical thickness condition 448
6.3.3 Threading dislocation under nonequilibrium conditions 451
6.4 Layered and graded ¯lms 455
6.4.1 Uniform strained layer capped by an unstrained layer 456
6.4.2 Strained layer superlattice 460
6.4.3 Compositionally graded ¯lm 462
6.5 Model system based on the screw dislocation 463
6.5.1 Critical thickness condition for the model system 464
6.5.2 The in°uence of ¯lm{substrate modulus di®erence 465
6.5.3 Example: Modulus di®erence and dislocation formation 469
6.6 Non-planar epitaxial systems 470
6.6.1 A buried strained quantum wire 472
6.6.2 E®ect of a free surface on quantum wire stability 477
6.7 The in°uence of substrate compliance 482
6.7.1 A critical thickness estimate 483
6.7.2 Example: Critical thickness for a compliant substrate 486
6.7.3 Mis¯t strain relaxation due to a viscous underlayer 487
6.7.4 Force on a dislocation in a layer 490
6.8 Dislocation nucleation 493
6.8.1 Spontaneous formation of a surface dislocation loop 495
6.8.2 Dislocation nucleation in a perfect crystal 497
6.8.3 E®ect of a stress concentrator on nucleation 501
6.9 Exercises 504
7 Dislocation interactions and strain relaxation 506
7.1 Interaction of parallel mis¯t dislocations 507
7.1.1 Spacing based on mean strain 508
7.1.2 Spacing for simultaneous formation of dislocations 509
7.1.3 Spacing based on insertion of the last dislocation 511
7.2 Interaction of intersecting mis¯t dislocations 513
7.2.1 Blocking of a threading dislocation 515
7.2.2 Intersecting arrays of mis¯t dislocations 520
x Contents
7.3 Strain relaxation due to dislocation formation 523

xx_912 · 发表于 2006-3-11 00:14:49

7.3.1 Construction of a relaxation model 524
7.3.2 Example: Dislocation control in semiconductor ¯lms 527
7.4 Continuum analysis of ideally plastic ¯lms 531
7.4.1 Plastic deformation of a bilayer 532
7.4.2 Thin ¯lm subjected to temperature cycling 538
7.5 Strain-hardening response of thin ¯lms 541
7.5.1 Isotropic hardening 543
7.5.2 Example: Temperature cycling with isotropic hardening 546
7.5.3 Kinematic hardening 547
7.5.4 Proportional stress history 551
7.6 Models based on plastic rate equations 553
7.6.1 Thermally activated dislocation glide past obstacles 555
7.6.2 In°uence of grain boundary di®usion 558
7.7 Structure evolution during thermal excursion 561
7.7.1 Experimental observation of grain structure evolution 561
7.7.2 Experimental observation of threading dislocations 563
7.7.3 Strain relaxation mechanisms during temperature cycling 566
7.8 Size-dependence of plastic yielding in thin ¯lms 574
7.8.1 Observation of plastic response 574
7.8.2 Models for size-dependent plastic °ow 579
7.8.3 In°uence of a weak ¯lm-substrate interface 582
7.9 Methods to determine plastic response of ¯lms 584
7.9.1 Tensile testing of thin ¯lms 584
7.9.2 Microbeam de°ection method 586
7.9.3 Example: Thin ¯lm undergoing plane strain extension 589
7.9.4 Substrate curvature method 590
7.9.5 Instrumented nanoindentation 592
7.10 Exercises 596
8 Equilibrium and stability of surfaces 599
8.1 A thermodynamic framework 600
8.2 Chemical potential of a material surface 602
8.2.1 An evolving free surface 603
8.2.2 Mass transport along a bimaterial interface 607
8.2.3 Migration of a material interface 610
8.2.4 Growth or healing of crack surfaces 615
8.3 Elliptic hole in a biaxially stressed material 617
8.3.1 Chemical potential 619
8.3.2 Shape stability 620
Contents xi
8.4 Periodic perturbation of a °at surface 624
8.4.1 Small amplitude sinusoidal °uctuation 624
8.4.2 Example: Stability of a strained epitaxial ¯lm 629
8.4.3 In°uence of substrate sti®ness on surface stability 630
8.4.4 Second order surface perturbation 634
8.4.5 Example: Validity of the small slope approximation 638
8.5 General perturbation of a °at surface 639
8.5.1 Two-dimensional con¯gurations 640
8.5.2 Three-dimensional con¯gurations 641
8.5.3 Example: Doubly periodic surface perturbation 642
8.6 Contact of material surfaces with cohesion 644
8.6.1 Force{de°ection relationship for spherical surfaces 644
8.6.2 Example: Stress generated when islands impinge 650
8.7 Consequences of mis¯t dislocation strain ¯elds 651
8.7.1 Surface waviness due to mis¯t dislocations 652
8.7.2 Growth patterning due to mis¯t dislocations 654
8.8 Surface energy anisotropy in strained materials 657
8.8.1 Implications of mechanical equilibrium 658
8.8.2 Surface chemical potential 663
8.8.3 Energy of a strained vicinal surface 664
8.8.4 Example: Stepped surface near (001) for strained Si 669
8.9 Strained epitaxial islands 671
8.9.1 An isolated island 673
8.9.2 In°uence of an intervening strained layer 679
8.9.3 In°uence of surface energy anisotropy 681
8.9.4 Nucleation barrier for islands on stable surfaces 684
8.9.5 Shape transition for preferred sidewall orientations 686
8.9.6 Observations of island formation 689
8.10 Exercises 694
9 The role of stress in mass transport 697
9.1 Mechanisms of surface evolution 699
9.1.1 Surface di®usion 700
9.1.2 Condensation{evaporation 704
9.2 Evolution of small surface perturbations 705
9.2.1 One-dimensional sinusoidal surface 705
9.2.2 Example: The characteristic time 707
9.2.3 General surface perturbations 708
9.2.4 An isolated surface mound 712
9.3 A variational approach to surface evolution 714
xii Contents
9.3.1 A variational principle for surface °ux 716
9.3.2 Application to second order surface perturbation 720
9.4 Growth of islands with stepped surfaces 723
9.4.1 Free energy change 724
9.4.2 Formation and interaction of islands 726
9.5 Di®usion along interfaces 731
9.5.1 Stress relaxation by grain boundary di®usion 732
9.5.2 Di®usion along shear bands during deformation 738
9.6 Compositional variations in solid solutions 740
9.6.1 Free energy of a homogeneous solution 741
9.6.2 Stability of a uniform composition 745
9.6.3 Example: Elastic stabilization of a composition 749
9.6.4 Evolution of compositional variations 750
9.6.5 Coupled deformation-composition evolution 752
9.7 Stress assisted di®usion: electromigration 758
9.7.1 Atom transport during electromigration 759
9.7.2 The drift test 766
9.7.3 E®ects of microstructure on electromigration damage 767
9.7.4 Assessment of interconnect reliability 771
9.8 Exercises 772
Bibliography 774

xulifang · 发表于 2006-4-3 21:19:38

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hdkang · 发表于 2006-4-3 22:21:38

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zhw21st · 发表于 2006-8-25 16:31:52

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薄膜资料(Thin film Material)连续送第一部分!

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