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OwnerKazuto Okamura, Kazunori Ohmizo +1inventors
InventorsKazuto Okamura, Kazunori Ohmizo, Takaki Suzuki
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The invention relates to a substrate for HDD suspension. A laminate for HDD suspension comprises a stainless steel layer, a polyimide resin layer, and a conductor layer. The conductor layer is composed of a copper or copper alloy foil having a thickness of 14 μm or less, a tensile strength of 400 MPa, and a conductance of 65% or more. A suspension formed of such a laminate facilitates the control of the flying height of the slider of the suspension essential to great progress of the technology for higher capacity of HDDs, facilitates the impedance control improves the tension rate, reduces the loss of electric signal, facilitates machining of the shape of the flying lead, and provides durability.
1) A laminate for HDD suspension comprises a stainless steel layer, a polyimide resin layer and a conductor layer wherein said conductor layer is a copper foil or a copper alloy foil having a thickness of 14 μm or less, a tensile strength of 400 MPa or more and a conductance of 65% or more.
6) A method for manufacturing a laminate for HDD suspension which comprises applying a solution of a polyimide resin or a precursor thereof to a stainless steel layer, giving a heat treatment to form a polyimide resin layer, placing a rolled copper alloy foil having a thickness of 14 μm or less, a tensile strength of 500 MPa or more and a conductance of 65% or more on the aforementioned polyimide resin layer and hot-pressing at 1-20 MPa and 280° C. or above to give a laminate constituted of a stainless steel layer, a polyimide resin layer and a conductor layer.
Dependencies are inferred from the claim text.