Antenna clearance in folded electronic assemblies
Antenna clearance in a folded assembly must be reviewed in three dimensions.
Vibration constraints in an industrial controller
Vibration review for an industrial controller should include the enclosure, mounting features, rigid islands, and flexible connections as one mechanical…
Mechanical constraints in a compact patient monitor
A compact patient-monitor concept needs a mechanical interface map before its rigid-flex outline is fixed.
Comparing bare-board and assembled-system cost
Compare a rigid-flex architecture at the level of the deliverable you need.
AOI: defect coverage and limitations
Automated optical inspection, or AOI, provides evidence about features observable by the configured optical inspection process.
Microinches to micrometres: gold thickness conversion
To convert a gold thickness from microinches to micrometres, multiply by 0.0254.
Drill data review for plated and non-plated features
Drill data should identify the geometry of each hole and the manufacturing meaning of the feature.
What an impedance coupon can and cannot establish
An impedance coupon is a defined test structure used to obtain evidence about a manufactured transmission-line construction.
Total layers versus flex layers: why both matter
Specify both the total copper-layer construction and the copper layers present in each flexible region when describing a rigid-flex PCB.
Static bending versus dynamic flexing: writing the requirement
A useful flex requirement describes the motion the circuit will experience.