勛圖tv 繚 ENGINEERING GUIDE
Pyralux AC182500: Single-Sided Stackup and Termination
Pyralux AC182500 is a single-sided adhesiveless flex construction. The current AC ordering table distinguishes 18 繕m ED or RA foil variants over a 25 繕m dielectric. Its practical selection often turns on contact fit, local reinforcement and the complete installed thickness rather than the base laminate alone.
Make sidedness explicit
One copper face is supplied. Protective film, a shield bonded later or a stiffener must be identified separately. A two-layer finished flex requires an appropriate second conductor construction; it does not follow from adding coverlay. Keep the circuit-layer count distinct from the number of physical material layers in the section.
Construction and decision boundaries
| Review item | What this page establishes | What remains project-specific |
|---|---|---|
| Architecture | Single-sided AC | Coverlay does not add a circuit layer. |
| Critical region | Connector tail with local reinforcement | Measure at the required location. |
| Tolerance | Nominal and positive deviations | Arithmetic interval, not process capability. |
Build the connector-region stack
Enter every physical layer at the connector tail in the thickness worksheet. Include copper, dielectric, coverlay where present, adhesive, stiffener and any finish contribution significant to the requirement. Do not use the bend-span thickness for the mating-contact region. Compare the resulting interval with the connector manufacturer's drawing, including its measurement location and tolerance convention.
| Review item | What to establish |
|---|---|
| Supplied form | One copper face and complete suffix |
| Fit | Connector-region layer stack and limits |
| Registration | Contacts, coverlay and stiffener datum |
| Limit | Arithmetic sum is not a connector-fit approval |
Stackup thickness interval sum
Stackup thickness interval sum
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. |
| Layer entries 繚 CSV | All dimensions in mm. Use each physical thickness once. Minus and Plus are positive absolute deviations, not percentages. |
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 a thinner base honestly
AC181200 may change handling and the bend section, but the connector tail may still need reinforcement. A nominal laminate reduction does not always reduce the installed assembly thickness. Conversely, an unnecessarily thick stiffener can erase the intended benefit. Ask whether the design constraint is local insertion fit, global packaging or bending motion before making the change.
Keep adhesive alternatives separate
An LF9110R construction introduces a cured adhesive layer and different starting copper. AP8525R is double-sided. Neither should appear as an equivalent merely because all are polyimide-based. A comparison needs the same final conductor geometry, electrical tests, interface and manufacturing scope.
Control termination and coverlay details
State the contact geometry and which surface faces the connector. Show the coverlay setback, stiffener boundary and allowed positional error relative to the contacts. Consider how the tail is handled before insertion and whether the assembly process can damage an unsupported edge. Registration should be inspected at the feature that the connector actually engages.
Quote the usable assembly
Provide the connector part drawing, complete foil suffix, contact finish, panel delivery format and quantity. Ask for separate treatment of initial tooling and recurring production. The layer-sum tool gives a transparent dimensional starting point, while the manufacturing proposal must resolve local compression, process tolerances and the agreed inspection method.
Reconcile the connector tail and the flexible span separately
| Review point | Input to record | Decision or verification |
|---|---|---|
| Contact region | List the layers present exactly where the connector gauges thickness. | Coverlay outside the contact area must not be counted as though it sits under the contact. |
| Stiffener datum | Dimension the stiffener edge from a stable contact datum. | Check insertion depth and latch engagement after positional tolerances are included. |
| Alternative | Compare a thinner base with a local stiffener against a thicker base throughout. | Evaluate fit and bend geometry separately rather than choosing the lowest nominal total. |
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.