IEC 61249-4-1 : 1.0

MATERIALS FOR PRINTED BOARDS AND OTHER INTERCONNECTING STRUCTURES - PART 4-1: SECTIONAL SPECIFICATION SET FOR PREPREG MATERIALS, UNCLAD (FOR THE MANUFACTURE OF MULTILAYER BOARDS) - EPOXIDE WOVEN E-GLASS PREPREG OF DEFINED FLAMMABILITY

International Electrotechnical Committee

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FOREWORD
1 Scope
2 Normative references
3 Materials and construction
  3.1 Reinforcement
  3.2 Epoxide resin
4 Properties
  4.1 Properties related to the appearance of the prepreg
      4.1.1 Dewetted areas (fish eyes)
      4.1.2 Broken filaments
      4.1.3 Distortion
      4.1.4 Creases
      4.1.5 Edge conditions
  4.2 Properties related to B stage prepreg
      4.2.1 Resin content
      4.2.2 Treated weight
      4.2.3 Resin flow
      4.2.4 Scaled flow thickness
      4.2.5 Melting viscosity
      4.2.6 Gel time
      4.2.7 Volatile content
  4.3 Properties of prepregs after curing to C stage
      4.3.1 Electric strength
      4.3.2 Flammability
      4.3.3 Relative permittivity and dissipation factor
      4.3.4 Cured thickness
5 Delivery form
  5.1 Rolls
  5.2 Sheets
  5.3 Cut panels
6 Quality assurance
  6.1 Quality system
  6.2 Responsibility for inspection
  6.3 Qualification inspection
  6.4 Quality conformance inspection
  6.5 Certificate of conformance
  6.6 Safety data sheet
7 Packaging and marking
8 Shelf life
9 Ordering information
Bibliography

Abstract

Gives requirements for properties of prepreg that is mainly intended to be used as bonding sheets in connection with laminates according to IEC 61249-2-7 when manufacturing multilayer boards in line with IEC 62326-4.