Panasonic R-5375 PCB: Halogen-Free MEGTRON 6 Choices

Identify E and N before comparing data

The manufacturer technical sheet identifies R-5375(E) and R-5375(N), with corresponding R-5370 bonding materials. It distinguishes their reinforcement and dielectric characterization. Do not combine the E variant's mechanical context with the N variant's electrical value into an invented optimum grade.

Different Panasonic documents report characterization at different frequencies. Preserve the selected sheet's method, sample and revision. A change from a rounded 12 GHz table to a more detailed 13 GHz table is not evidence of a manufacturing improvement by itself.

Construction decisions at a glance

Keep halogen-free evidence separate from signal integrity

The chemical declaration and the channel model address different requirements. Ask for the exact product declaration needed by the customer, including the applicable criterion. A low-loss label does not establish chemical compliance, and a chemistry declaration does not qualify the electrical route.

If the original approved drawing uses R-5775(G), a proposal for R-5375(E) is a material change to evaluate. Record the thermal, dimensional and electrical assumptions rather than presenting the new product as a spelling variation.

Matched construction loss and allowance comparison

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 RAYPCB quotation. You can contact the team without completing it.

Compare the complete line and the quote scope

The paired worksheet accepts two complete routing-loss rates, a common length and user-entered unit allowances. Use matched frequency, reference planes and geometry. Keep the copper profile and any treatment changes with the model.

An illustrative ten-inch route at 1.0 versus 0.6 dB per inch differs by 4 dB. Those numbers are not grade presets. The commercial comparison is equally conditional: it is meaningful only when board quantity, inspection and qualification scope are comparable.

Examine reinforcement changes explicitly

The R-5775(N) timing guide shows why a low-Dk-glass choice needs more than a single loss number. Changes in dielectric construction can affect geometry and propagation assumptions, while weave placement can remain relevant to sensitive differential routes.

Confirm available glass styles, resin content and core dimensions with the fabricator. A public product list does not guarantee that every proposed thin core or pressed interval is available for the planned quantity and production schedule.

Review the multilayer process boundary

High layer count and sequential construction expose the material to a process history that differs from a simple two-layer board. Identify the deepest holes, relevant copper distribution and representative verification locations. Thermal characterization alone does not approve the full construction.

For thin mobile HDI, the R-A 555W guide addresses a separate geometry and material task. Do not apply a processing example from that family as a universal cure or drilling instruction for R-5375.

Freeze the change decision before ordering

Send the original and proposed stackups, exact suffixes, chemistry requirement, channel allocation and assembly history. Include quantity, board size, copper and the requested test evidence. Ask the supplier to identify deviations from the analyzed construction.

The useful deliverable is a documented choice and a comparable quote, with unresolved supply or qualification questions still visible. Calculator outputs can accompany the inquiry manually, but they do not authenticate the source or authorize a substitution.

Tie the exact grade to an electrical construction

State the channel reference planes, frequency range, routing length, copper construction, transitions and interface assumptions together. A laminate loss-tangent value is one input to that system. It is not a complete insertion-loss measurement or a guarantee that a data rate will work.

Use comparable measurement or modeling conditions when screening alternatives. Material changes can require geometry changes to preserve impedance, and copper roughness can alter the result independently of the resin system. Keep the proposed stackup and the channel analysis synchronized through fabrication review.

For procurement, identify the properties that are fixed and the alternatives that can be evaluated. Request evidence at the relevant construction and frequency rather than a broad low-loss label. Compare total delivered scope and validation effort alongside material price. A shorter or better-routed channel may change the tradeoff more than replacing a material name alone.

A useful design-data record retains both the material value and the reason it was selected. State whether the value is supplier characterization, a construction-specific design input, a measured coupon extraction or an early assumption. These sources are not interchangeable. Keep frequency, method and specimen information visible when a comparison uses more than one document.

The tool on this page starts empty because a plausible default can otherwise be mistaken for a verified grade profile. Use the example to understand the units, then replace it with project inputs. A result with many decimal places does not imply that the material or routing-loss input is known to that precision.

For a high-speed design, plan how the model will be checked. Reference planes, coupon geometry, fixtures and the acceptance boundary determine what a measurement means. A coupon that characterizes one line construction does not automatically qualify every route or transition on the board.

Keep the commercial comparison aligned with the engineering one. Quantity, copper, layer structure, test deliverables and qualification effort should be comparable. A lower material allowance can be irrelevant if the proposed construction cannot meet the channel requirement, while a premium grade may be unnecessary if the actual route already has sufficient validated margin.