IEC 61249-3-4:1999

IEC 61249-3-4:1999 addresses adhesive coated flexible polyimide film within the broader family of materials for printed boards and other interconnecting structures. For engineering, procurement, and compliance teams, it serves as a technical reference when evaluating base materials intended for flexible printed boards. By defining the sectional specification set for an unreinforced, clad or unclad material, IEC 61249-3-4:1999 supports documented evaluation, material selection, and technical review during product qualification and supplier assessment.

IEC 61249-3-4:1999 standard overview

This document focuses on the material characteristics and classification context for adhesive coated flexible polyimide film used in flexible interconnecting structures. It is relevant where design teams need a consistent specification basis for comparing candidate materials, preparing engineering documentation, or supporting conformity assessment activities. As part of the IEC 61249 series, IEC 61249-3-4:1999 is best understood as a primary technical reference for material-level requirements rather than a general-purpose test method.

Applications of IEC 61249-3-4:1999

IEC 61249-3-4:1999 is typically used in workflows involving flexible printed boards, interconnection systems, and related electronics manufacturing decisions. It may be consulted during product evaluation, incoming material review, laboratory evaluation, and qualification of adhesive coated flexible polyimide film for assembly processes. The document can also support purchasing specifications, vendor comparisons, and verification activities where consistent material behavior and documented technical compliance are important to the final application.

Why IEC 61249-3-4:1999 matters

For organizations working on flexible electronics, the value of IEC 61249-3-4:1999 lies in helping align material selection with repeatable quality workflows and controlled technical assessment. A clear reference reduces ambiguity during procurement, supports risk management, and improves consistency across engineering validation and conformity assessment preparation. It also helps teams structure requirements for inspection, acceptance, and documentation when a flexible polyimide film is being considered for use in printed board or interconnecting structure designs.

• Defines a focused reference point for adhesive coated flexible polyimide film used in flexible printed board materials.
• Supports engineering review, supplier qualification, and material comparison in procurement workflows.
• Assists with documented evaluation and technical validation for flexible interconnecting structure applications.
• Provides a basis for conformity assessment preparation and quality assurance documentation.