Patent ID: 6814825
Filing Date: 2004-11-09
Classification: B29C,B29L,B32B,G11B

Abstract:
A method of bonding a first planar substrate to a second planar substrate by a bonding material in the form of a viscous fluid, comprising:pumping the viscous fluid with a dosing pump to a dosing arm connected to the dosing pump and positioned over the first substrate; forming a layer of viscous fluid on the first substrate by dosing the first substrate with viscous fluid from the dosing arm; rotating the first substrate with a rotary drive; positioning the second substrate onto the layer of viscous fluid formed on the first substrate with a connecting means; spinning off excess viscous fluid of the layer between the first substrate and the second substrate with a rotary centrifugal drive; and controlling a thickness of the layer formed on the first substrate to a predetermined thickness by controlling at least one of the dosing pump, a position of the dosing arm with respect to the first substrate, a rotary speed of the rotary drive, and a rotary speed of the rotary centrifugal drive in response to: (a) a temperature of the first substrate; (b) a temperature of the second substrate; and (c) at least one of a temperature of the viscous fluid and a viscosity of the viscous fluid.