Patent ID: 7434474
Filing Date: 2008-10-14
Classification: G01L

Abstract:
1. A pressure sensor comprising: a sensor die; an intermediate packaging member or sleeve having a first portion with a first perimeter extending into and coupled to a second portion with a second perimeter, the first portion distally located from the sensor die, wherein the first perimeter is larger than the second perimeter; a glass support tube located within the intermediate sleeve or member, the glass support tube having an expanded perimeter portion with a perimeter sized to be closely received by the first portion of the intermediate sleeve or member and further having a reduced perimeter portion with a perimeter sized to be closely received by the second portion of the intermediate sleeve or member, the expanded perimeter portion is distally located from the sensor die, the glass support tube includes a bore for receiving a pressurized fluid, wherein a contour of an outer surface defined by the expanded and reduced perimeter portions of the glass support tube complements a contour of an inner surface defined by the first and second portions of the intermediate sleeve or member; and an attachment layer to couple the glass support tube to the intermediate sleeve or member, the attachment layer located between the outer surface defined by the expanded and reduced perimeter portions of the glass support tube and the inner surface defined by the first and second portions of the intermediate sleeve or member, wherein applied pressure on the sensor die places at least a portion of the attachment layer in compression.