Method of fabricating electro-mechanical devices by multilayer deposition

• US 6,200,508 B1
• Filed: 10/27/1997
• Issued: 03/13/2001
• Est. Priority Date: 10/25/1996
• Status: Expired due to Term

• Current Assignee: Massachusetts Institute of Technology
• Original Assignee: Massachusetts Institute of Technology
• Inventors: Albert, Jonathan, Jacobson, Joseph M., Gershenfeld, Neil
• Primary Examiner(s): ORTIZ, ANGELA Y
• Application Number:
  US08/958,098
• Time in Patent Office: 1,233 Days
• Field of Search: 264/104, 264/255, 264/105, 264/254, 264/131, 264/132, 264/427, 264/272.11, 264/272.19, 264/272.2, 264/250, 264/308
• US Class Current: 264/104
• CPC Class Codes: B29C 41/20 incorporating preformed parts or layers, e.g. moulding inserts or for coating articles
• CPC Class Codes: B29C 64/112 using individual droplets, e.g. from jetting heads
• CPC Class Codes: B29K 2995/0005 Conductive
• CPC Class Codes: B29K 2995/0008 Magnetic or paramagnetic
• CPC Class Codes: B29L 2031/3061 Number plates
• CPC Class Codes: B33Y 10/00 Processes of additive manufacturing
• CPC Class Codes: B33Y 70/00 Materials specially adapted for additive manufacturing

Abstract

Printing techniques are used to build three dimensional structures by depositing successive layers of the device onto a substrate. The layers and/or portions thereof are different materials, e.g., conductors and insulators, which provide the desired functional characteristics of the device. The substrate may be used only to provide a support for the printing process, in which case it will usually be removed after the device is fabricated, or may instead be a functioning part of the fabricated device.

Claims

1. A method of fabricating a three-dimensional, electromechanical component composed of a plurality of portions consisting of different materials, said method comprising the steps of:

preparing a substrate;

selecting the materials so that the material from a first of said plurality of sources is an electrically non-conductive material and the material from a second plurality of sources is an electrically conductive material;

movably mounting a plurality of material sources opposite the substrate so that material from each source may be directed toward the substrate;

controllably activating while moving said first and second in at least two dimensions so that the materials from said sources are deposited in layers on the substrate to build up said portions on the substrate layer by layer, so that said non-conductive material is laid down to form a non-conductive portion and said conductive material is laid down to form a conductive portion electromechanically cooperative with the non-conductive portion, and

continuing the activating while moving step until all of the layers of all of the materials collectively form the component, said materials being deposited by said sources being selected so that at least one of said plurality of portions is movable relatively.

2. The method defined in claim 1 including the step of selecting the plurality of sources from the group consisting of fluid jetting, electro-plating and electroless-plating apparatus.

3. The method defined in claim 1 including the additional step of separating said substrate from said plurality of portions.

4. The method defined in claim 1 including selecting the materials so that the material from a first of said plurality of sources is a semiconducting material.

5. The method defined in claim 1 including selecting the materials so that the material directed from a first of said plurality of sources is a ferromagnetic material.

6. The method defined in claim 5 including the additional step of permanently magnetizing said ferromagnetic material.

7. The method defined in claim 1 wherein said first source is controlledly activated and moved to form a tube.

8. The method defined in claim 7 wherein a third one of said plurality of sources is controlledly activated and moved to lay down inside said tube a ferromagnetic material to form a third one of said plurality of portions in the form of an armature coaxial to said cylinder and said coil.