吃瓜tv 路 Flexible circuit engineering & manufacture
Double-Sided Flex PCB Manufacturing
Specify both copper layers鈥攁nd the connection between them.
Prepare a two-copper-layer manufacturing brief with plated holes, contact openings, finish and assembly requirements.
Choose what you need to resolve
Use a check below, or send existing files directly. You do not need to finish the worksheet to enquire.
Release a manufacturable connection, not only a layer count
Show the two copper layers, interconnecting holes, exposed contacts and covered regions. Specify whether a contact is soldered, repeatedly mated or permanently connected before choosing its finish. A plated hole and its pad need a defined relationship to the bend region and supporting structure.
Use the two-layer connector and stackup page for the detailed tolerance comparison. The worksheet on this page prepares the manufacturing scope; it does not approve hole geometry or substitute for fabrication artwork.
Prepare your fabrication requirements
Use only the checks your project needs. Already have files? Send your files directly for a quote.
No data is sent by this worksheet.
Carry Brief to Enquiry temporarily keeps this text in the same browser tab and adds it to the Contact message. Review it there and attach your actual files. No request is submitted until you send the form.
Project inputs stay in this tab. Carrying a brief uses temporary tab storage for up to 30 minutes; files are not transferred. Examples explain arithmetic and are not approved production stackups.
Double-Sided Flexible PCB 鈥� design decisions
A double-sided flex PCB adds a second routing layer and may use plated interconnections between the two faces. It can provide extra routing capacity or a reference conductor, but its thickness, pad openings and reinforcement still need to suit the mechanical installation.
| RFQ detail | What to provide | Why it changes the job |
|---|---|---|
| Interconnections | Hole chart, pad diameters and finished hole requirements | Defines plating and the finished electrical connection. |
| Copper usage | Routing, return conductors and any copper balancing requirements | A second layer is not automatically a continuous impedance reference plane. |
| Coverlay | Openings around pads and connector lands | Opening geometry and registration affect assembly access. |
| Stiffeners | Drawing with local thickness and connector tolerances | Adhesive and flex thickness contribute to the finished insertion dimension. |
For a worked thickness review, use the two-layer stackup and connector design guide. For fabrication, send the layer artwork, drill data and reinforcement drawing together.
Quote a two-sided circuit with its openings and holes defined
| Manufacturing input | Why it changes the build |
|---|---|
| Finished copper on both sides | Changes etching, flexibility and local thickness. |
| Plated holes and their locations | Defines interconnection processing; bend-zone holes need specific review. |
| Coverlay artwork | Controls exposed lands and the protected bend area. |
| Stiffener and adhesive drawing | Defines local support and connector thickness. |
| Panel outline and contacts | Affects handling, assembly and the delivered format. |
This page covers procurement and fabrication of the two-copper-layer circuit. For a layer-by-layer thickness calculation and connector fit, use the two-layer flex design example. Do not use a connector鈥檚 nominal thickness as the unreinforced bend-section thickness.
Prepare the two-layer fabrication drawing
State whether copper thickness values refer to starting foil or finished copper. Specify the final construction rather than expecting the fabricator to infer it from a connector photograph. The bending area and the plated-hole area may have different design priorities; mark the mechanical zones clearly.
If two layers cannot carry the required routing, compare four-layer flex construction. If components are included, review flex assembly tooling and support before finalizing the panel.
Material selection starts with the actual laminate, copper and coverlay grades. Refer to and the supplier drawing for each selected grade. Kapton and Pyralux are not interchangeable names for every flexible circuit material.
Questions to resolve before ordering
How does this page differ from the two-layer connector guide?
This page covers double-sided fabrication scope. The connector guide reviews local thickness and contact interfaces. Use the same controlled project files for both discussions.
What should the fabrication drawing make explicit?
Identify plated interconnections, local coverlay openings, contact side, finish, reinforcement and delivered panel state. Keep hole data and the drawing revision aligned.
Product details for your design review
Existing 吃瓜tv gallery images illustrate circuit form. Ask for construction-specific records to establish layer count, material, tolerances and test results.
From a preliminary question to a build-ready enquiry
| Your project stage | Send what you already have | Define before release |
|---|---|---|
| Concept / budget | Application, sketch or approximate outline, installation/motion conditions and quantity range. Unknowns are welcome. | Candidate construction, unresolved dimensions, cost assumptions and whether assembly is included. |
| Design ready | Artwork, drill data, drawing/revision and requested quantity. Identify critical contacts, bend zones and inspection requirements. | Approved stackup, controlled revision, finish, tooling and inspection scope; confirm the lead-time starting conditions. |
| Assembly / transfer | BOM, placement and assembly information where available; supply responsibility, existing test baseline and known issues. | Permanent supports versus temporary carriers, first-article acceptance, test ownership, delivered shape and packaging. |
Compare the full quotation scope
Separate recurring manufacture from one-time tooling, carriers and test development. Compare the same material definition, finish, delivered state and acceptance evidence. A low unit price can exclude a carrier or inspection record required by your product. Request lead time against the actual materials, released files and agreed work; a target date is not a delivery guarantee.
Make sample approval useful for the next batch
Identify the drawing revision and acceptance criteria used for the first build. Record approved material substitutions and resolved engineering questions rather than relying on an email label such as 鈥渟ame as last time.鈥� Ask which dimensional, electrical and construction records are included, which require separate development, and how changes will be approved before a repeat order.
Send your existing files directly, or generate a brief above and choose Carry Brief to Enquiry. Review the message and attach the actual files on Contact before submitting.