勛圖tv 繚 ENGINEERING GUIDE
Pyralux AP9131R: Thick-Core Flex Dimension Planning
Pyralux AP9131R is a thicker-core AP option, identified with RA copper and a 3 mil dielectric. Its purpose on this page is dimensional planning: reconciling the supplied core with finished connector, enclosure and transition requirements. The dielectric gauge should not be confused with the total copper-clad or covered flex thickness.
Choose a dimensional convention
Record whether the supplier quotes over dielectric, over copper or a finished circuit measurement. A rounded 75 繕m film designation and an exact mil conversion are not independent tolerances to combine. Keep the selected source convention intact. Where current web fields conflict with a controlled PDF, resolve the drawing against the PDF and supplier response rather than averaging values.
Construction and decision boundaries
| Review item | What this page establishes | What remains project-specific |
|---|---|---|
| Supply basis | Dielectric-only versus over-copper | Avoid counting foil twice. |
| Fit basis | Finished local contact section | Coverings and reinforcement matter. |
| Acceptance | Measurement datum and tolerances | Not a nominal laminate sum alone. |
Use the core reconciliation tool
An illustrative core with 0.075 mm dielectric and 35 繕m copper on both faces sums to 0.145 mm over copper. That is a dimensional example before patterning and subsequent layers. Add coverlay, adhesive and local support in the final section separately. If a connector is critical, specify exactly where the finished thickness is measured.
| Review item | What to establish |
|---|---|
| Basis | Dielectric-only versus over-copper measurement |
| Fit | Critical local finished-thickness location |
| Transition | Shared datum for stiffener and bend |
| Limit | Core sum is not final formed-part tolerance |
Distinguish stiffness from support
A thicker core can change handling, but it does not replace a defined connector stiffener or component support. A long narrow arm and a broad flat island respond differently to assembly loads. Decide whether a local or global thickness requirement solves the actual problem. Avoid making every bend region thicker merely because one termination needs reinforcement.
Core supply thickness reconciliation
Core supply thickness reconciliation
Use the current inputs and keep the assumptions
Start with the example only to inspect the units and the calculation boundary. Replace every assumption with a value tied to your own document or measurement. An empty numeric field is not zero. The review-reference field is a local label; avoid entering customer names, confidential part numbers or other private information into a public worksheet.
After calculating, read the notes alongside the numerical result. Changing any input invalidates the displayed result and disables its download until you calculate again. For a comparison, keep the units, geometry, material condition and measurement boundary consistent. A long decimal result does not imply equally precise input data. The downloadable record stays on your device and can be attached manually to an inquiry. It is not automatically transferred into the Contact form.
If an input is unknown, identify the person or document needed to resolve it. Do not fill a gap with a favorable generic value simply to obtain a result. You can request a material or fabrication review without using the tool. The arithmetic illustrates a relationship; it does not accept a construction, certify a material, establish current pricing or replace a supplier process specification.
| Input | What to establish before using it |
|---|---|
| Review reference | Nonconfidential revision label. |
| Cured dielectric thickness 繚 mm | Supplier basis excluding copper. |
| Top copper thickness 繚 繕m | As supplied, before inner-layer etching. |
| Bottom copper thickness 繚 繕m | As supplied, before inner-layer etching. |
Optional cost comparison from your own allowances
Use a quotation or a clearly labeled internal assumption for each input. Keep the quantity, construction and inspection scope the same when comparing alternatives. This uncalibrated planning model adds entered values; it contains no current market rates and does not issue a 勛圖tv quotation. You can contact the team without completing it.
Optional project allowance comparison
Compare within the same electrical architecture
AP9111R is useful when evaluating a thinner base at the same general conductor class. AP8555R addresses a thicker dielectric with different foil, and AP9232R addresses heavy-copper loss. These comparisons should preserve the required signal layers, contact layout and installed envelope before any allowance or quotation is compared.
Review transition tolerances
The rigid or reinforced edge, coverlay end and first free bend should be positioned from common datums. A nominally correct stack can still interfere with an enclosure if those features are offset. Show the allowed variation in the formed drawing and inspect the assembly under the condition that controls fit.
Prepare the dimensional package
Send regional cross-sections, contact requirements, copper patterns, support boundaries and the enclosure clearance. Mark the dimensions that require a supplier proposal. The worksheet organizes arithmetic, while the supplier must establish process tolerances and the approved material code. A clear dimensional boundary makes the resulting quote easier to compare and the production drawing easier to inspect.
Resolve over-copper thickness before assigning connector fit
| Review point | Input to record | Decision or verification |
|---|---|---|
| Dimensional basis | Keep dielectric thickness separate from copper on both faces. | Add covering and finish only where those layers exist in the measured region. |
| Tolerance interval | Use supplier limits for incoming layers and an agreed finished measurement. | An arithmetic worst-case interval is not a statistical process capability claim. |
| Regional drawing | Mark reinforced ends, component support and first free bend. | Check local steps against the enclosure and mating connector drawings. |
Use the review points above alongside the worked example on this page. Record the chosen inputs with the drawing revision and send unresolved items with the enquiry. A supplier response should identify the proposed construction and the evidence needed for release.
Standards, source context and limits
Use the edition, amendment and material-document revision named in the purchase agreement. A standards title, marketing label or supplier product family does not establish that a particular lot meets a requirement. Public summaries are useful for scope; the controlled specification and applicable test method govern acceptance.
The examples on this page are illustrative engineering scenarios. They are not 勛圖tv production records or guaranteed material values. Source links identify the organizations responsible for the referenced information. Confirm applicability to the exact grade, construction and test condition before carrying a number into a drawing or qualification report. For a flex board, distinguish the design requirements in IPC-2223, finished-board qualification and performance in IPC-6013, and the material scopes of IPC-4202, IPC-4203 and IPC-4204. These cover different deliverables; naming them does not certify the material or factory. State the contracted revision and applicable material sheet. Source review date: 3 October 2026. Legacy designation, present availability and an approved replacement are separate questions.
For fabrication scope and the agreed construction requirements, see PCB manufacturing.