Materials/Electronics materials
Electronics materials
electronicsWhat this is
Solders, circuit boards, capacitors, memory materials and wire insulation.
Small parts decide reliability. Outgassing, radiation and thermal cycling affect them over long missions.
Types
Pick a type to see its materials.
| Type | Materials | Ranking |
|---|---|---|
| Solders | none yet | — |
| Memory materials | none yet | — |
| Dielectrics and capacitors | none yet | — |
| Circuit board laminates | 1 | — |
| Wire insulation | none yet | — |
What matters
The measurements we use to compare electronics materials. Each one has a standard test and a direction: is higher or lower better?
| Measurement | Better when | How it is tested |
|---|---|---|
| Outgassing, total mass loss (TML)Mass lost in vacuum that can fog optics | lower | ASTM E595 |
| Outgassing, condensable (CVCM)Vapor that recondenses on cold surfaces | lower | ASTM E595 |
| Thermal cycling survivalHot-cold cycles survived without cracking | higher | ECSS-Q-ST-70-04 |
| Total ionizing dose toleranceAccumulated dose before a part drifts or fails | higher | MIL-STD-883 TM 1019; ESCC 22900 |
| Single-event LET thresholdHow energetic one particle hit must be to upset it | higher | JESD57; ESCC 25100 |
| Single-event cross-sectionHow likely each hit is to cause an upset | lower | JESD57; ESCC 25100 |
| Thermal expansion (CTE)How much it grows when heated; mismatch cracks joints | depends on the use | ASTM E831, E228 |