Materials for semiconductor leadframes

Back-end Process

Copper stripes

KFC material developed by KOBELCO is the de facto standard alloy in power semiconductors

  • Copper alloy providing both conductivity/heat dissipation and strength for precision processing that is indispensable for lead frame materials.
  • Not based on rare earths, KFC is an excellent precipitation type alloy widely recognized in the semiconductor industry with thermal resistance in addition to excellent electric/thermal properties and strength.
  • KLF194 is a product intended to differentiate technology for removal of internal residual stress, and is well accepted for etching lead frame applications which require high standards for material stress.
KLF194 for IC（flat stripes）
KFC for power use（dual gauge stripes）

Product line-up

High conductivity and heat resistant alloy KFC™

This is a precipitation-hardened copper alloy with fine Fe2P compounds in the matrix, formed by adding small amounts of iron and phosphorus to copper.
High strength and high conductive copper alloy SuperKFC™

This is a precipitation-hardened alloy that is reinforced by forming fine iron-phosphorous intermetallic compounds in the matrix.
List of copper rolled products

Leadframes

Our leadframes contribute to the transformation to a decarbonized society, in areas such as electric cars and power generation by renewable energy.

  • KOBELCO entered the leadframe business in the 1980s; so we have relations with major power semiconductor makers worldwide.
  • We keep a stable supply and respond with the “One Stop” approach to requests for high technology development by integrated systems with copper material.
Leadframes for power semiconductors
Discrete
Frame and heatsink for power modules

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