EC ENGR 123A · EE 123AFundamentals of Solid-State I
Electrical and Computer Engineering · 4 units · Undergraduate upper division (100-199)
Limited to junior/senior engineering majors. Fundamentals of solid-state, introduction to quantum mechanics and quantum statistics applied to solid-state. Crystal structure, energy levels in solids, and band theory and semiconductor properties.
Letter grading.
When it runs
- Winter 2026
- Fall 2026
Scheduled, not typical — from UCLA’s Schedule of Classes, which publishes Fall 2025 through Spring 2027 and nothing before it.
Requisites
Official UCLA wording
Requisite: course 2 or Physics 1C.
BruinTree reads · Prerequisite
confidence 1.00 · from textRequires
Everything that has to come before this course, not just the courses named in the requisite above.
EC ENGR 123A
- EC ENGR 2Physics for Electrical Engineers
- PHYSICS 1CPhysics for Scientists and Engineers: Electrodynamics, Optics, and Special Relativityanother path to it
- PHYSICS 1CPhysics for Scientists and Engineers: Electrodynamics, Optics, and Special Relativity
- MATH 32ACalculus of Several Variables
- PHYSICS 1APhysics for Scientists and Engineers: Mechanics
- MATH 32BCalculus of Several Variables
- MATH 31BIntegration and Infinite Series
- PHYSICS 1BPhysics for Scientists and Engineers: Oscillations, Waves, Electric and Magnetic Fields
- MATH 33ALinear Algebra and Applications
2 direct requisites. Showing 20 courses over 3 levels; the branches marked with a count carry on past it. Every course here opens its own tree.
Unlocks
What this course is a requisite for, and what those courses lead to in turn.
EC ENGR 123A
- EC ENGR 123BFundamentals of Solid-State II
- EC ENGR 270Applied Quantum Mechanics
- EC ENGR 223Solid-State Electronics I
- EC ENGR 224Solid-State Electronics II
- EC ENGR 225Physics of Semiconductor Nanostructures and Devices
- EC ENGR 229Seminar: Advanced Topics in Solid-State Electronics
2 courses list this as a requisite. The whole downstream is here — 6 courses over 3 levels. Every course here opens its own tree.