Hermetic Seal Process for Multilevel Metallurgy
Original Publication Date: 1981-May-01
Included in the Prior Art Database: 2005-Feb-11
Hermetically sealed, multilevel metallurgy for integrated circuits is provided using quartz layers that are thinner than the metal lands. Quartz layer 1 is deposited on substrate 2 to about one half the thickness of metal layer 3 (Fig. 1). A planarizing layer 4 of photoresist is applied such that the ratio of the thickness delta 2 to delta 1 is larger than it would be if quartz layer 1 was of equal thickness to metal layer 3 (Fig. 2).