Patent ID: 11867968
Assignee: AMS SENSORS SINGAPORE PTE. LTD.
Field: Optics (Instruments)
Classification: CPC G  B | IPC G

Claim 6:
7. A method for producing a wafer stack, comprising
providing a first wafer comprising a plurality of first members, wherein each of the first members comprises a first distancing element;
providing a second wafer comprising a plurality of second members;
aligning the first and the second wafer with respect to each other to establish a plurality of pairs of mutually aligned associated first and second members;
providing each of the pairs with a portion of a bonding material by applying a portion of the bonding material to one or to both of the first and the second members of each of the pairs;
moving the first wafer and the second wafer towards each other, until each of the first distancing elements abuts the associated second member;
effecting, by the moving, that for each of the pairs, the respective portion of bonding material forms a layer of bonding material interconnecting the respective first and second members, wherein a thickness of the layers is defined by the first distancing element; and
wherein the first and second members of each of the pairs comprise surfaces which are designed to establish a capillary pressure acting on the respective portion of the bonding material which is gradually inwardly decreasing and gradually outwardly decreasing;
wherein the gap opens up inwardly more rapidly than it opens up outwardly.