Cohesion Energy
Atomic bond energy holding crystalline structures together governs physical stability and threshold energies required for atomic displacement. Lattice binding energy measures the energy needed to remove an atom from a solid crystal lattice to infinity. Surface analysis techniques like secondary ion mass spectrometry depend on lattice binding energy values to calculate sputter yields during depth profiling.
Target atoms must absorb energy exceeding this binding threshold before ejection from the material matrix can occur. The scope applies to crystalline or ordered solid structures and stops applying once materials melt into liquid phase or amorphize completely.
Sputter Yield
Sputtering processes erode material surfaces by transferring kinetic energy from incident ions to target atoms. Higher lattice binding energy increases resistance to ion sputtering and reduces overall erosion rates during depth profiling. Selective sputtering occurs in multi-element alloys when constituents possess differing binding energies.
Surface roughness develops when adjacent crystalline grains sputter at varying rates due to binding energy orientation.
Surface Analysis
Depth profile calibration adjusts erosion rates based on known lattice binding energy data for target materials and substrate matrices. Computer simulations of atomic collisions utilize binding energy inputs to predict cascade mixing and depth resolution. Matrix effects alter binding energy in compound semiconductors and metal oxides.
Analysts verify depth profile accuracy by comparing sputtered crater depths against optical profilometry measurements.
