Non-permeable substrate carrier for electroplating
View Patent ↗One embodiment relates to a substrate carrier for use in electroplating a plurality of substrates. The substrate carrier comprises a non-conductive carrier body on which the substrates are to be held. Electrically-conductive lines are embedded within the carrier body, and a plurality of contact clips are coupled to the electrically-conductive lines embedded within the carrier body. The contact clips hold the substrates in place and electrically couple the substrates to the electrically-conductive lines. The non-conductive carrier body is continuous so as to be impermeable to flow of electroplating solution through the non-conductive carrier body. Other embodiments, aspects and features are also disclosed.
1. A substrate carrier for use in electroplating a plurality of substrates, the substrate carrier comprising:
a non-conductive carrier body on which the substrates are to be held;
cavities in the non-conductive carrier body;
electrically-conductive lines embedded within the carrier body; and
a plurality of contact clips which are coupled to the electrically-conductive lines embedded within the carrier body, the contact clips holding the substrates in place and electrically coupling the substrates to the electrically-conductive lines,
wherein the non-conductive carrier body is continuous so as to be impermeable to flow of electroplating solution through the non-conductive carrier body.
2. The substrate carrier of claim 1 , wherein non-conductive carrier body comprises a first thermoplastic layer and a second thermoplastic layer which are joined together thereby forming the cavities, and wherein the electrically-conductive lines are arranged in between the first and second thermoplastic layers.
3. The substrate carrier of claim 1 , wherein the cavities are arranged at positions so as to be behind the substrates when the substrates are clipped to the substrate carrier.
4. The substrate carrier of claim 3 , further comprising:
a ribbing pattern within said cavities.
5. The substrate carrier of claim 4 , wherein the ribbing pattern comprises an X-shaped pattern.
6. The substrate carrier of claim 1 , further comprising:
a plurality of spacing features on the non-conductive carrier body, the spacing features being configured to space the substrates from a top surface of the non-conductive carrier body when the substrates are clipped onto the substrate carrier.
7. The substrate carrier of claim 1 , further comprising:
a plurality of aligning features on the non-conductive carrier body, wherein the aligning features are arranged to surround and align the substrates placed on the substrate carrier.
8. The substrate carrier of claim 7 , wherein the aligning features are configured to be removable from the carrier body and replaceable with new aligning features.
9. The substrate carrier of claim 8 , wherein the aligning features comprise pegs.
10. The substrate carrier of claim 9 , wherein the pegs are tapered.
11. The substrate carrier of claim 1 , further comprising:
an electrically-conductive bus bar configured at a top side of the non-conductive carrier body and conductively coupled to the electrically-conductive lines embedded in the non-conductive carrier body.
12. The substrate carrier of claim 11 , further comprising:
a plurality of mounting holes in the bus bar for mounting the substrate carrier onto a work arm for dipping the non-conductive carrier body into, and raising the non-conductive carrier body out of, an electroplating bath while a voltage is applied to the bus bar.
13. A substrate carrier for use in electroplating a plurality of substrates, the substrate carrier comprising:
a non-conductive carrier body on which the substrates are to be held, wherein the non-conductive carrier body is continuous so as to be impermeable to flow of electroplating solution through the non-conductive carrier body;
electrically-conductive lines embedded within the carrier body;
a plurality of contact clips which are coupled to the electrically-conductive lines embedded within the carrier body, the contact clips holding the substrates in place and electrically coupling the substrates to the electrically-conductive lines; and
a plurality of spacing features on the non-conductive carrier body, the spacing features being configured to space the substrates from a top surface of the non-conductive carrier body when the substrates are clipped onto the substrate carrier, wherein the spacing features comprise removable pads.
14. The substrate carrier of claim 13 , wherein the removable pads have a flat surface which is tear-drop shaped.
15. A method of electroplating a plurality of substrates, the method comprising:
mechanically holding the plurality of substrates onto a substrate carrier having a non-permeable, non-conductive carrier body and an electrically-conductive path through the carrier body to substrates;
mounting the substrate carrier on a work arm;
dipping the carrier body with the substrates held thereon into an electroplating bath; and
applying a voltage to the substrates via the electrically-conductive path through the non-permeable, non-conductive carrier body.