Engineering Selection Reference
Castellated-hole hybrid PCB: engineering review
Review castellation geometry, hybrid materials and module-to-host-board assembly as separate engineering tasks. This configuration is illustrative and does not document a delivered KFPCBA product.
All numeric and material callouts below are illustrative, unverified review inputs. They are not evidence of KFPCBA delivery, measured performance, certification or current manufacturing limits. A new order requires approved drawings and confirmation of the complete process combination.
Illustrative configuration inputs
| Review item | Illustrative input and unresolved conditions |
|---|---|
| Candidate material system | RO4350-designated material plus FR4; exact grades and layer allocation unverified |
| Illustrative board thickness | 1.6 mm; confirm tolerance and stackup |
| Reference feature | Plated castellated edge holes |
| Unverified coating callout | 0.05 µm gold; finish construction and measurement basis require definition |
Review the engineering boundaries
Castellated edges need defined hole centers, pitch, board-edge datums, routing direction, tolerances and metallization inspection locations. Module continuity does not establish solder-joint quality on the host board. Host-board pads, paste printing, placement height, thermal processing and rework clearance require their own assembly review.
Required RFQ inputs
Provide castellation diameter and pitch, hole-center-to-edge dimensions, plated-hole construction, hybrid stackup, edge-routing requirements, panel connections and module-to-host-board interface drawings.
Acceptance and traceability
Agree on edge dimensions, copper-wall continuity, burr inspection, net testing and representative host-board trial assembly. Retain solder-wetting, alignment and functional records separately from bare-board acceptance.
Engineering review scenario
If a host-board connector blocks rework or thermal-measurement access, review the module and host board together before changing castellation pads. An unchanged module outline does not prove an unchanged assembly process.
This scenario explains a review method; it is not a documented defect or test result from a KFPCBA project.
Quotation and delivery scope
Itemize materials, fabrication, engineering preparation, agreed inspections, reports, packaging, taxes and freight. Identify quantity units, drawing revision, approved deviations and tooling ownership. Assembly, software and complete-system validation are separate unless expressly included. No published unit price, schedule or capability guarantee is established by this reference.
Packages, pads and stencils · Manufacturing data packages
Submit fabrication files for review or use the short project inquiry. Identify this reference page and list the inputs still to be defined.
