An interface mismatch found at bring-up can mean another board build. Confirm the outline, stackup and acceptance requirements before fabrication. QueenEMS builds load board, probe-card and burn-in PCBs to your released design data.
Illustrative image.
Each risk below is a common gap between design intent and the board that gets built. Each one maps to a specific review input and a written acceptance point.
Send the drawing package you have and identify the questions to resolve before fabrication.
Start an Engineering Review
Connects packaged devices to the tester through sockets, relays and signal-conditioning parts.
Carries signals between the tester interface and the probe head while wafers are probed.
Stackup, via and planarity detail: probe card PCB manufacturing guide
Holds many devices in sockets under bias and elevated temperature inside a burn-in chamber.
Illustrative PCB configurations; final construction follows the approved design.
The board family decides which drawing matters first. Each review starts with the document that defines the interface the board must meet.
Scroll sideways to see all columns.
| Board family | Where it works | Interface it must match | First document we review | What we build |
|---|---|---|---|---|
| Load board PCB | Final test of packaged devices | Tester interface outline, socket footprints, stiffener mounting | Mechanical interface drawing with holes and keep-outs | Bare PCB to your approved data; assembly to an agreed BOM when quoted |
| Probe card PCB | Wafer sort | Prober mounting and the probe-head pad array | Outline and pad-array drawing with the planarity area marked | The printed circuit board; probe head and card assembly stay with your supplier |
| Burn-in board PCB | Devices under bias and temperature in a chamber | Chamber slot, edge connector and socket grid | Slot and edge-connector drawing with operating temperature | Bare PCB in the laminate you specify or approve; socket fitting only when quoted |
| Other DUT or interface board | Handler, bench or fixture interfaces | Your mechanical and connector definition | Fabrication drawing and stackup | Bare PCB to your approved data |
Layer construction and material availability affect price and feasibility. Confirm these details during review so the quotation matches the approved build.
You define the electrical intent in your design data. We confirm what the fabricated board will be built and checked against.
You supply
Agreed on the order
You supply
Agreed on the order
Agree which board-level checks verify the released fabrication requirements. Your test engineering team validates channel performance on the tester.
An unmarked hole tolerance or contact keep-out can become a fit problem after fabrication. Put these requirements on the drawing before release.
State the area, not just the number
A flatness limit means little without the region it applies to and how it is measured. Mark the area on the drawing and agree the measurement method during quotation.
Socket and stiffener supply or fitting is quoted case by case when you need it.
Use these points to agree what will be checked and recorded for your project.
| Area | Your input | Acceptance on the order |
|---|---|---|
| Stackup | Layers, dielectrics, copper weights, finished thickness | Approved stackup drawing revision |
| Impedance | Targets per net class and reference layers | Coupon and measurement method, if required |
| Mechanical | Outline, holes, stiffener interface, tolerances | Dimensional check method and sampling |
| Flatness | Limit and the area it applies to | Measurement method agreed in writing |
| Contact finish | Finish for socket, pogo-pin or probe areas | Finish callout on the fabrication drawing |
| Workmanship | IPC class and electrical test expectations | Class and test coverage stated on the order |
Only your email is required to inquire. Add the information you have so we can identify the next review step.
To start a review
To quote
Before release
Use the inquiry form at the top of this page. Upload one ZIP, RAR or Gerber/drill file up to 50 MB; put PDF drawings and ODB++ data inside a ZIP or RAR archive.
Assembly is optional, with turnkey parts through Mouser, DigiKey or LCSC, or your consigned material. PCB lead time is quoted per material and construction. Our PCBA work typically takes about 5–8 working days once all materials are ready.
Gerber or ODB++, drill data, drawing, stackup and interface constraints.
Specific questions and proposed adjustments come back to you.
Agree stackup, finish, IPC class, checks and change approval in writing.
Fabrication, plus assembly if quoted, checked by the agreed methods.
Boards ship with the records agreed in step 3.
Lead time depends on material availability and construction and is confirmed with the quotation. For a general manufacturability check on draft data, see our PCB DFM review.
Test hardware is often reordered long after the first build. Fix the reference points while the prototype is fresh.
Agree who reviews and approves each change before a repeat build, and reference the approved revision on every order. Prototype acceptance and production acceptance can be defined separately when early builds are engineering samples.
QueenEMS and Queenpcb Limited are the same company, supporting PCB fabrication and assembly projects for over a decade.
Requirements are reviewed against the class on your order, including IPC Class 3 when the project calls for it.
Turnkey parts through Mouser, DigiKey or LCSC, or your consigned material, assembled to an agreed BOM and process.
You know which requirements we confirm and which stay with your test engineering team before an order is placed.
No. We fabricate PCBs from your design data and review them for manufacturability. Interface design, test programs and calibration stay with your team or your design partner.
We can assemble components to an agreed BOM and process. Socket supply, socket installation, stiffeners and tester integration are confirmed case by case during quotation; they are not included by default.
We confirm this per design at feasibility review. Send the stackup, impedance table and flatness limit with the area it applies to. Our conventional multilayer range runs up to 24 layers; higher-layer constructions are assessed individually.
Gerber or ODB++ with drill files, a fabrication drawing, the stackup, impedance targets, the required IPC class and quantities. Add the BOM and placement file if assembly is in scope. Partial data is fine for a first review.
Fabrication lead time depends on material availability and construction, so it is quoted per project. As a general guide for our PCBA work, assembly takes about 5–8 working days once all materials are ready; ATE build schedules are confirmed with each order.
Yes. Record the approved stackup, materials and acceptance requirements at the first build, then reference the same revision on repeat orders. Any change to laminate, finish, stackup or drill data should be approved before it is built.
Send an email address and whatever data you have. We come back with feasibility questions and a quotation for the agreed construction.
