PACKAGED OPTO-ELECTRONIC MODULE

• US 20160216445A1
• Filed: 01/26/2015
• Published: 07/28/2016
• Est. Priority Date: 01/26/2015
• Status: Active Grant

• Current Assignee: Oracle International Corporation (Oracle Corporation)
• Original Assignee: Oracle International Corporation (Oracle Corporation)
• Inventors: Thacker, Hiren D., Krishnamoorthy, Ashok V., Zheng, Xuezhe, Cunningham, John E.
• Granted Patent: US 9,678,271 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 2006/12061 Silicon
• CPC Class Codes: G02B 2006/12142 Modulator
• CPC Class Codes: G02B 6/12004 Combinations of two or more optical elements
• CPC Class Codes: G02B 6/30 for use between fibre and thin-film device
• CPC Class Codes: G02B 6/32 having lens focusing means positioned between opposed fibre ends with lens being an integral part of the single fibre end G02B6/262
• CPC Class Codes: G02B 6/4219 Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
• CPC Class Codes: G02B 6/4257 having a supporting carrier or a mounting substrate or a mounting plate G02B6/3648 takes precedence
• CPC Class Codes: G02B 6/4274 Electrical aspects G02B6/4263 and G02B6/4265 take precedence
• CPC Class Codes: H01L 2224/16225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 23/49827 Via connections through the substrates, e.g. pins going through the substrate, coaxial cables H01L23/49822, H01L23/49833, H01L23/4985, H01L23/49861 take precedence
• CPC Class Codes: H01L 23/49838 Geometry or layout
• CPC Class Codes: H01L 23/49894 Materials of the insulating layers or coatings
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 2924/15311 being a ball array, e.g. BGA
• CPC Class Codes: H04B 10/803 Free space interconnects, e.g. between circuit boards or chips

Abstract

A chip package includes an optical integrated circuit (such as a hybrid integrated circuit) and an integrated circuit that are proximate to each other in the chip package. The integrated circuit includes electrical circuits that modulate data, communicate data, and serialize/deserialize data, and the optical integrated circuit communicates optical signals with very high bandwidth. Moreover, a front surface of the integrated circuit is electrically coupled to a top surface of an interposer, and a top surface of the integrated circuit is electrically coupled to a front surface of the optical integrated circuit. Furthermore, a bottom surface of the optical integrated circuit faces the top surface of the interposer, and the front surface of the optical integrated circuit is optically coupled to an optical-fiber receptacle, which in turn is optically coupled to an optical-fiber connector.

Claims

1. A chip package, comprising:

an integrated circuit having a front surface with first integrated-circuit connector pads and second integrated-circuit connector pads, wherein the integrated circuit is configured to;

modulate data, communicate data, and serialize/deserialize data;

first integrated-circuit electrical connectors electrically coupled to the first integrated-circuit connector pads;

an interposer having a bottom surface and a top surface, facing the front surface of the integrated circuit, with first interposer connector pads electrically coupled to the first integrated-circuit electrical connectors;

second integrated-circuit electrical connectors electrically coupled to the second integrated-circuit connector pads;

an optical integrated circuit having a bottom surface, facing the top surface of the interposer, and a top surface, facing the front surface of the integrated circuit, with first optical-integrated-circuit connector pads electrically coupled to the second integrated-circuit electrical connectors, wherein the optical integrated circuit is configured to communicate optical signals;

an optical-fiber receptacle having a first surface and a second surface, wherein the first surface is mechanically and optically coupled to the top surface of the optical integrated circuit; and

an optical-fiber connector mechanically and optically coupled to the second surface of the optical-fiber receptacle.

2. The chip package of claim 1, wherein the optical integrated circuit includes second optical-integrated-circuit connector pads on the bottom surface of the optical integrated circuit;

wherein the interposer includes second interposer connector pads on the top surface of the interposer; and

wherein the chip package further includes optical-integrated-circuit electrical connectors electrically coupled to the second optical-integrated-circuit connector pads and the second interposer connector pads.

3. The chip package of claim 1, wherein the interposer includes a cavity defined by a surface;

and

wherein the optical integrated circuit is at least partially included in the cavity.

4. The chip package of claim 1, wherein the optical-fiber receptacle includes a lens on at least one of:

the first surface, and the second surface.

5. The chip package of claim 1, wherein the optical-fiber receptacle includes first alignment features on the first surface to facilitate alignment between the optical-fiber receptacle and the top surface of the optical integrated circuit;

and

wherein the optical-fiber receptacle includes second alignment features on the second surface to facilitate alignment between the optical-fiber receptacle and the optical-fiber connector.

6. The chip package of claim 1, wherein the optical-fiber connector includes a vertical optical-fiber connector configured to mechanically and optically couple to an optical fiber along a direction perpendicular to a plane of the interposer.

7. The chip package of claim 1, wherein the optical-fiber connector includes a horizontal optical-fiber connector configured to mechanically and optically couple to an optical fiber along a direction in a plane of the interposer.

8. The chip package of claim 1, wherein the integrated circuit is configured to perform one of:

transmitting data, receiving data, and transmitting and receiving data.

9. The chip package of claim 1, wherein the first integrated circuit is configured to transmit data;

and

wherein the chip package includes;

a second integrated circuit having a front surface with third integrated-circuit connector pads and fourth integrated-circuit connector pads, wherein the second integrated circuit is configured to receive data;

third integrated-circuit electrical connectors electrically coupled to the third integrated-circuit connector pads and second interposer connector pads on the top surface of the interposer; and

fourth integrated-circuit electrical connectors electrically coupled to the fourth integrated-circuit connector pads and second optical-integrated-circuit connector pads on the top surface of the optical integrated circuit.

10. The chip package of claim 1, wherein the chip package further comprises a substrate thermally and electrically coupled to the bottom surface of the interposer.

11. The chip package of claim 10, wherein the interposer includes through-interposer vias electrically coupling the bottom surface of the interposer and the top surface of the interposer.

12. The chip package of claim 1, wherein the optical integrated circuit is implemented using silicon-on-insulator technology.

13. The chip package of claim 1, wherein the interposer includes one of:

an organic material, a ceramic, glass, and a semiconductor.

14. The chip package of claim 1, wherein, with the exception of the optical fiber connector, the chip package is solder-reflow compatible up to 260 C.

15. A system, comprising:

a processor;

a memory coupled to the processor; and

a chip package, wherein the chip package includes;

an integrated circuit having a front surface with first integrated-circuit connector pads and second integrated-circuit connector pads, wherein the integrated circuit is configured to;

modulate data, communicate data, and serialize/deserialize data;

first integrated-circuit electrical connectors electrically coupled to the first integrated-circuit connector pads;

an interposer having a bottom surface and a top surface, facing the front surface of the integrated circuit, with first interposer connector pads electrically coupled to the first integrated-circuit electrical connectors;

second integrated-circuit electrical connectors electrically coupled to the second integrated-circuit connector pads;

an optical integrated circuit having a bottom surface, facing the top surface of the interposer, and a top surface, facing the front surface of the integrated circuit, with first optical-integrated-circuit connector pads electrically coupled to the second integrated-circuit electrical connectors, wherein the optical integrated circuit is configured to communicate optical signals;

an optical-fiber receptacle having a first surface and a second surface, wherein the first surface is mechanically and optically coupled to the top surface of the optical integrated circuit; and

an optical-fiber connector mechanically and optically coupled to the second surface of the optical-fiber receptacle;

16. The system of claim 15, wherein the optical integrated circuit includes second optical-integrated-circuit connector pads on the bottom surface of the optical integrated circuit;

wherein the interposer includes second interposer connector pads on the top surface of the interposer; and

wherein the chip package further includes optical-integrated-circuit electrical connectors electrically coupled to the second optical-integrated-circuit connector pads and the second interposer connector pads.

17. The system of claim 15, wherein the interposer includes a cavity defined by a surface;

and

wherein the optical integrated circuit is at least partially included in the cavity.

18. The system of claim 15, wherein the first integrated circuit is configured to transmit data;

wherein the chip package includes;

a second integrated circuit having a front surface with third integrated-circuit connector pads and fourth integrated-circuit connector pads, wherein the second integrated circuit is configured to receive data;

third integrated-circuit electrical connectors electrically coupled to the third integrated-circuit connector pads and second interposer connector pads on the top surface of the interposer; and

fourth integrated-circuit electrical connectors electrically coupled to the fourth integrated-circuit connector pads and second optical-integrated-circuit connector pads on the top surface of the optical integrated circuit.

19. The system of claim 15, wherein the chip package further comprises a substrate thermally and electrically coupled to the bottom surface of the interposer.

20. A method for communicating data between an integrated circuit and an optical integrated circuit, wherein the method comprises:

coupling digital electrical signals from interposer connection pads on a top surface of an interposer to first integrated-circuit connector pads on a front surface of the integrated circuit;

converting the digital electrical signals to analog electrical signals;

coupling the analog electrical signals from second integrated-circuit connector pads on the front surface of the integrated circuit to optical-integrated-circuit connector pads on a top surface of the optical integrated circuit;

generating optical signals based on the analog electrical signals; and

communicating the optical signals to an optical fiber via an optical-fiber receptacle and an optical-fiber connector.