{"sections":[{"heading":"Use consistent units","paragraphs":["For a uniform thin film, Sigma = 1 / (sheet resistance × thickness). Express thickness in the model's length unit. With micrometre units, the result is in ohm^-1 micrometre^-1.","A generic example: sheet resistance 2 ohm/square and thickness 0.1 micrometre give Sigma = 5 ohm^-1 micrometre^-1. These are illustrative values, not a recommended fabrication process."]},{"heading":"Check the active material model","paragraphs":["A per-layer value can override the global Sigma. The manual also states that defining Lambda for a layer makes Sigma and MuR inactive for that layer. Confirm the intended normal-conductor or superconducting model before interpreting a conductivity change."]},{"heading":"Verify","paragraphs":["Inspect the effective process definition and use a simple resistive example to check units and geometry. A plausible Sigma does not prove that the contacts and current path are correct."]}],"canonical_url":"https://www.sun-magnetics.com/knowledge-base/inductex-conductivity-units","url":"/knowledge-base/inductex-conductivity-units","known_issues":[],"search_record":{"execution":false,"relatedProducts":[],"version_tags":["InductEx 8 preview"],"text":"Convert sheet resistance and thickness to Sigma correctly Sigma is bulk conductivity in inverse ohms per model length unit. Convert thickness to the LDF length unit before using sheet resistance. InductEx 8 beta/preview How to Use consistent units For a uniform thin film, Sigma = 1 / (sheet resistance × thickness). Express thickness in the model's length unit. With micrometre units, the result is in ohm^-1 micrometre^-1. A generic example: sheet resistance 2 ohm/square and thickness 0.1 micrometre give Sigma = 5 ohm^-1 micrometre^-1. These are illustrative values, not a recommended fabrication process.  Check the active material model A per-layer value can override the global Sigma. The manual also states that defining Lambda for a layer makes Sigma and MuR inactive for that layer. Confirm the intended normal-conductor or superconducting model before interpreting a conductivity change.  Verify Inspect the effective process definition and use a simple resistive example to check units and geometry. A plausible Sigma does not prove that the contacts and current path are correct. ","id":"inductex-conductivity-units","keywords":"","kind":"How to","title":"Convert sheet resistance and thickness to Sigma correctly","product":"InductEx"},"version":"8 beta/preview","id":"inductex-conductivity-units","related":["/knowledge-base/inductex-process-connectivity"],"downloads":[],"publication_status":"published","numerical_output":null,"provenance":{"execution_checks":[],"figure_evidence":[],"review_notes":["Support history informed this draft. Current-source guidance has been checked; a fresh walkthrough on the intended distributed release and product-owner review remain pending."],"scope":"Recorded inputs/builds only. Complete walkthrough and final-package acceptance remain separate.","verification_requirements":{"gui_method":"not-required-for-this-answer","status":"review-incomplete","illustrations":"not-required-for-this-answer","required":["technical-review","release-applicability"],"legacy_walkthrough_field":"pending retained; not evidence of a complete scenario"},"sources":[{"id":"support:SUP-010","section":"Generalised editorial finding; outcome qualification retained"},{"id":"inductex:docs/manual/ix_ldf.tex","section":"Global and per-layer Sigma; Units; Lambda"}]},"title":"Convert sheet resistance and thickness to Sigma correctly","type":"How to","markdown_url":"/_functions/kbResource?path=markdown%2Finductex-conductivity-units.md","summary":"Sigma is bulk conductivity in inverse ohms per model length unit. Convert thickness to the LDF length unit before using sheet resistance.","product":"InductEx"}