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Use the exact laminate and prepreg pairing

The source identifies KB-6160A laminate with KB-6060A prepreg. Record the complete names, supplied form and document revision in the stackup and purchasing list. Cured core thickness and pressed bonding thickness are different dimensions and should not be mixed.

The KB-6160 guide covers the unsuffixed pairing. Similar product names or typical values do not authorize a substitution. Ask the supplier to identify the actual proposed construction and preserve any approved change with the fabrication files.

Source-qualified material review

Read the thermal data with its specimen context

The cited typical Tg is 138掳C by DSC and Td is 310掳C at a 5% mass-loss criterion, in a 1.6 mm, eight-ply 7628 context. These figures characterize different responses. They do not provide a continuous operating temperature or an unlimited lead-free assembly allowance.

If the design has a minimum property requirement, identify the method and acceptance basis. A typical figure is not automatically a guaranteed lot limit. Request the evidence applicable to the supplied thickness and construction rather than copying an entire generic FR-4 table.

Resolve the halogen claim independently

The letter A is not chemical evidence. Obtain a product-specific declaration under the customer's actual halogen criterion if that requirement applies. Keep its scope, date and supplied product identity with the procurement record.

RoHS restrictions and total halogen criteria answer different questions. A report addressing restricted substances does not automatically establish every halogen-free claim. The KB-4002 review illustrates another case where an uncertain product name and composition statement must be resolved separately.

KB-6160A PCB requirement register

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 吃瓜tv quotation. You can contact the team without completing it.

Keep the CAF exclusion visible

The official sheet excludes applications requiring CAF resistance. Do not describe KB-6160A as a generic solution for high-reliability biased-humidity conditions without a suitable alternative and evidence. The finished board's geometry and processing do not make the material restriction disappear.

State the actual environmental and electrical requirement in the RFQ. If an alternative is proposed, review the construction and qualification work needed. A favorable Tg or a chemical declaration cannot substitute for the required CAF evidence.

Use the register for claims that need different records

Create separate rows for exact identity, supplied construction, halogen declaration, thermal requirement and reliability scope. The worksheet summarizes open items and requires references for recorded claims. It does not certify a material or determine whether a declaration is legally sufficient.

For an unresolved KB-6165A callout, keep the exact suffix question separate rather than borrowing this page's information. Use nonconfidential references and attach the local download manually when it helps an engineering discussion.

Request the actual material and evidence in the quote

Send the drawing, stackup, quantity, assembly exposure and the chemical or reliability requirements that are fixed. Ask the supplier to name the proposed grade and identify any exceptions. If a halogen-free alternative is necessary, require an explicit product and approval decision.

The allowance tool adds your own one-time, recurring and test inputs. It cannot determine current price, stock or the cost of an unreviewed substitution. The PCB material directory supports wider selection once the requirement and evidence gaps are clear.

Close the material and construction decision together

The finished board combines a dielectric, copper patterns, holes, surface coatings and a manufacturing history. Its behavior cannot be inferred from a family name alone. State the supplied grade, reinforcement, thickness, copper and processing conditions that matter to the intended application.

Keep handling and assembly requirements with the fabrication drawing. A thin panel, punched outline or unusual support condition can change the production route even when the electrical circuit is simple. Ask the fabricator to review the actual features and panel format rather than assuming a dimensional example represents a production capability.

For cost comparison, hold the drawing, quantity, test scope and acceptance requirements constant. Record one-time tooling separately from recurring work, and distinguish raw material utilization from accepted-board yield. Any calculator on this page uses supplied assumptions; an actual quotation requires the files and an agreed scope.

A source-qualified table should be read alongside the exclusions and footnotes, not separated from them. If the supplier limits an application, identify whether that limitation affects the current design before requesting a price. A familiar family classification does not override an explicit restriction, and a positive calculator result cannot remove it.

For a repeat build, compare the newly proposed supply with the previously approved material record. Exact grade, manufacturing site where relevant, foil treatment, reinforcement and dimensional basis can matter. Define which changes require notification and which need technical approval. This avoids turning a purchasing substitution into an unnoticed design change.

Receiving records should support the agreed identity and traceability requirement. A certificate for a raw material, a finished-board inspection report and an assembly test result cover different boundaries. Request the records that actually answer the project questions rather than collecting unrelated certificates.

When a source contains conflicting values, keep the discrepancy visible until a controlled revision or written supplier response resolves it. Do not create a new table by combining the most favorable entries from several sources. The released drawing, material list and quotation should all describe the same accepted construction.