Patent ID: 6410976
Filing Date: 2002-06-25
Classification: H01L,Y10S

Abstract:
Integrated circuitry comprising:a semiconductive wafer fragment having front and back surfaces; integrated circuitry disposed over both the front and back surfaces; at least one passageway extending entirely through the wafer fragment between the front and back surfaces, the passageway being defined by an interior surface comprising material of the wafer fragment, the passageway extending into the wafer fragment in a direction which is generally normal relative to the front and back surfaces and defining a pair of opposing parallel sidewalls extending between the front and back surfaces, the passageway having an aspect ratio of between 75 and 80, the passageway being lined with an electrically insulating material, the electrically insulating material comprising a silicon nitride layer in physical contact with material of the wafer fragment within the passageway, the electrically insulating material comprising a silicon dioxide layer over and in physical contact with the silicon nitride layer, the silicon nitride layer and the silicon dioxide layer having a combined thickness of from 50 nanometers to 100 nanometers; and conductive material comprising conductive aluminum disposed within the at least one passageway and in physical contact with the silicon dioxide layer, the conductive aluminum electrically interconnecting the integrated circuitry disposed over the front and back surfaces, the passageway not containing any semiconductive wafer fragment material.