Library Exchange Format
General Information
| Title | LEF File Extension |
| Extension | .lef |
| Full Form | Library Exchange Format |
| File Type | CAD File |
| Developer | Electronic Design Automation Industry |
| MIME Type | application/octet-stream |
File Function
| Primary Function | Store layout |
| Additional Functions | Define technology, Represent schematics |
| Features | ASCII text, Interoperable |
File Characteristics
| Quality | High precision |
| Supports Layers | Yes |
| Supports Transparency | No |
| Editable | Yes |
Use Cases
| IC Design | Yes |
| Physical Verification | Yes |
| Library Sharing | Yes |
Security and Practices
| Security Risks | File corruption |
| Best Practices | Version control, Regular backups |
Historical/Version Information
| Initial Release | 1980s |
| Latest Version | Varies by tool |
Associated Types
| Similar Extensions | .def, .gds, .v, .sdc |
Software Compatibility
| Software | Usage Policy | OS Compatibility |
|---|---|---|
 Cadence Design Systems |
Commercial | Windows, Linux |
| Synopsys Design Compiler |
Commercial | Linux |
| Mentor Graphics |
Commercial | Windows, Linux |