Fluidic assembly top-contact LED disk

A direct emission display comprising:

• a substrate having a substrate surface, wherein a plurality of wells extend into the substrate and below the substrate surface;
• and
• a plurality of stand alone light emitting diodes (LED) each including a first layer formed of a first semiconductor material, a second layer formed of a second semiconductor material, and a multiple quantum well (MQW) disposed between the first layer and the second layer, wherein the stand alone LEDs are formed apart from the substrate, and after formation are each deposited in a respective one of the plurality of wells in the substrate, wherein each of the plurality of stand alone LEDs includes:
• a first diode surface and a second diode surface, wherein the second diode surface is opposite the first diode surface, and wherein each of the stand alone LEDs includes an anode connection and a cathode connection on the first diode surface.

A direct emission display, the display comprising:

• a plurality of light emitting diodes (LED), wherein each of the plurality of LEDs includes:
• a lower layer having a first surface and a second surface, wherein the second surface is opposite the first surface;
• a multiple quantum well (MQW) having a third surface and a fourth surface, and wherein the third surface of the MQW is adjacent the second surface of the lower layer;
• an upper layer having a fifth surface and a sixth surface, wherein the fifth surface is opposite the sixth surface, wherein the fifth surface of the upper layer is adjacent the 4th surface of the MQW;
• wherein an LED contact layer includes both a portion of the sixth surface of the upper layer corresponding to a first electrical contact and a portion of the second layer of the lower layer corresponding to a second electrical contact;
• and
• a substrate having a seventh surface and an eighth surface, wherein the eight surface is opposite the seventh surface, wherein the plurality of LEDs are each deposited into a respective one of a plurality of wells extending into the seventh surface of the substrate such that the first electrical contact and the second electrical contact are accessible from the seventh surface of the substrate, wherein each of the plurality of wells includes a well bottom and a well sidewall extending from the well bottom to the surface of the substrate, and wherein no conductive material is deposited between the well sidewall and the respective one of the LEDs deposited in the well.