ELECTROPLATING SYSTEMS AND METHODS

In a general aspect, an electroplating system includes a vessel, an electrolytic plating solution in the vessel, a cathode terminal, first and second anode terminals, and first and second variable power supplies. The cathode terminal is configured to electrically connect with a workpiece that is submerged in the electrolytic plating solution. The first anode terminal is in the electrolytic plating solution on a first side of the workpiece. The second anode terminal is in the electrolytic plating solution on a second side of the workpiece opposite the first side. The first variable power supply coupled between the cathode terminal and the first anode terminal. The second variable power supply coupled between the cathode terminal and the second anode terminal.

TECHNICAL FIELD

This description relates to electroplating, such as electroplating of semiconductor device assemblies.

BACKGROUND

Electrochemical processes, such as electroplating, can be used to plate metal surfaces (e.g., exposed copper surfaces) of semiconductor device assemblies (device assemblies, assemblies, etc.), such as exposed metal surfaces of a leadframe, metallic seed layers on a substrate, direct-bonded metal layers on a substrate, etc. For instance, such processes can be used to perform tin plating (or plating with other metals), where such plating can prevent corrosion (e.g., oxidation) of corresponding metal surfaces, such as copper, as well as improve solderability of metal surfaces of a semiconductor device assembly. Prior electroplating approaches can have certain drawbacks, however, such as non-uniform plating thickness, where a plating thickness for metal surfaces on one side of an assembly is undesirably thicker than a plating thickness for metal surfaces on an opposite side of the assembly. Such thicker plating can result in leakage and or electrical shorts (e.g., between signal pins or pads and/or power supply pins and/or terminals, etc.) due to excess plating material creating undesired conduction pathways. Also, such prior approaches can increase overall operating and/or product costs due to consumption of excess plating material.

SUMMARY

In a general aspect, an electroplating system includes a vessel, an electrolytic plating solution in the vessel, a cathode terminal, first and second anode terminals, and first and second variable power supplies. The cathode terminal is configured to electrically connect with a workpiece that is submerged in the electrolytic plating solution. The first anode terminal is in the electrolytic plating solution on a first side of the workpiece. The second anode terminal is in the electrolytic plating solution on a second side of the workpiece opposite the first side. The first variable power supply is coupled between the cathode terminal and the first anode terminal. The second variable power supply is coupled between the cathode terminal and the second anode terminal.

Implementations can include one or more of the following features, alone or in combination. For example, the first variable power supply can include a first variable voltage power supply, and the second variable power supply can include a second variable voltage power supply.

The first variable power supply can include a first variable current power supply, and the second variable power supply can include a second variable current power supply.

The first anode terminal and the second anode terminal can each include a solid plating material that is soluble in the electrolytic plating solution.

The electrolytic plating solution can include methane sulfonic acid (MSA) and a liquid plating material.

The electroplating system can include a third anode terminal in the electrolytic plating solution on the first side of the workpiece, and a fourth anode terminal in the electrolytic plating solution on the second side of the workpiece. The electroplating system can include a third variable power supply that is coupled between the cathode terminal and the third anode terminal, and a fourth variable power supply that is coupled between the cathode terminal and the fourth anode terminal.

The third variable power supply can include a first variable voltage power supply, and the fourth variable power supply can include a second variable voltage power supply.

The third variable power supply can include a first variable current power supply, and the fourth variable power supply can include a second variable current power supply.

The workpiece can be a strip of block molded semiconductor device assemblies.

In another general aspect, a method includes electrically coupling a workpiece with a common cathode terminal of an electroplating system and submerging the workpiece in an electrolytic plating solution. The method further includes supplying, from a first anode terminal submerged in the electrolytic plating solution, a first plating current for electroplating at least one plateable surface on a first side of the workpiece. The method further includes supplying, from a second anode terminal submerged in the electrolytic plating solution, a second plating current for electroplating at least one plateable surface on a second side of the workpiece. The second plating current is different than the first plating current, and the second side of the workpiece is opposite the first side of the workpiece.

Implementations can include one or more of the following features, alone or in combination. For example, the workpiece can be a strip of block molded semiconductor device assemblies.

The first plating current can be based on an area of the at least one plateable surface on the first side of the workpiece. The second plating current can be based on an area of the at least one plateable surface on the second side of the workpiece.

The first plating current can be used for plating a first portion of the at least one plateable surface on the first side of the workpiece, and the second plating current can be used for plating a first portion of the at least one plateable surface on the second side of the workpiece. The method can include supplying, from a third anode terminal submerged in the electrolytic plating solution, a third plating current for electroplating a second portion of the at least one plateable surface on the first side of the workpiece. The method can also include supplying, from a fourth anode terminal submerged in the electrolytic plating solution, a fourth plating current for electroplating a second portion of the at least one plateable surface on the second side of the workpiece.

The third plating current can be different than the first plating current, and the fourth plating current can be different than the second plating current.

The third plating current can be equal to the first plating current, and the fourth plating current can be equal to the second plating current.

The third plating current can be equal to the first plating current, and the fourth plating current can be different than the second plating current.

In another general aspect, an electroplating system includes a vessel, an electrolytic plating solution in the vessel including a liquid plating material, a common cathode terminal, a first anode terminal, a second anode terminal, a third anode terminal, a fourth anode terminal, a first variable power supply, a second variable power supply, a third variable power supply, and a fourth variable power supply.

The common cathode terminal is configured to electrically connect with a workpiece that is submerged in the electrolytic plating solution. The first and second anode terminals are in the electrolytic plating solution on a first side of the workpiece. The third anode terminal and fourth anode terminals are in the electrolytic plating solution on a second side of the workpiece opposite the first side. The first variable power supply is coupled between the common cathode terminal and the first anode terminal. The second variable power supply is coupled between the common cathode terminal and the second anode terminal. The third variable power supply is coupled between the common cathode terminal and the third anode terminal. The fourth variable power supply is coupled between the common cathode terminal and the fourth anode terminal.

Implementations can include one or more of the following features, alone or in combination. For example, the first variable power supply can include a first variable voltage power supply. The second variable power supply can include a second variable voltage power supply. The third variable power supply can include a third variable voltage power supply. The fourth variable power supply can include a fourth variable voltage power supply.

The first variable power supply can include a first variable current power supply. The second variable power supply can include a second variable current power supply. The third variable power supply can include a third variable current power supply. The fourth variable power supply can include a fourth variable current power supply.

The workpiece can be a strip of block molded semiconductor device assemblies.

DETAILED DESCRIPTION

This disclosure is directed to electroplating systems (plating systems, systems, etc.) and associated methods that address at least some of the drawbacks of previous approaches that were noted above. For instance, plating systems and methods described herein can reduce non-uniformity in plating thicknesses on surfaces (e.g., plateable surfaces) on opposite sides of semiconductor device assemblies, such as strips of block molded semiconductor device assemblies or packages. Such block molded strips can have different plateable surface areas on opposite sides, e.g., a first plateable surface area on a top side of the strip, and a second, different plateable surface area on a bottom side of the strip. Molding compound surfaces, for purposes of this disclosure, are not plateable surfaces.

In disclosed approaches, separate, variable power supplies (e.g., variable voltage and/or current) can be used to supply respective plating currents for plateable surfaces on each side of a semiconductor assembly (e.g., based on corresponding areas of the respective plateable surfaces), rather than providing a single, fixed plating current, as in prior approaches. For instance, if the respective plateable surfaces have different areas and/or are not symmetric, prior plating approaches can result in undesirably thicker plating on the plateable surfaces on a side of the assembly where an area of the plateable surfaces is relatively smaller area, e.g., as compared with an area of the plateable surfaces on the opposite side.

In contrast, using example implementations described herein, different plating currents can be provided (e.g., on each side of an assembly) such that equal, or approximately equal, plating current densities (e.g., in amps (A) per decimeter-squared (dm2)) are used for respectively plating surfaces on each side, e.g., on a top side and a bottom side, of an assembly, where the respective plateable surfaces are not symmetric and/or have different surface areas.

Further, example approaches described herein can reduce manufacturing and/or product costs by reducing an amount of plating material used as a result of improved plating thickness uniformity. Additionally, by improving plating uniformity, leakage and/or electrical shorts can be prevented, particularly in assemblies with tight pitches (e.g., small distances between signal pins, signal pads, and/or other plated surfaces), as application of undesired excess plating material causing such leakage and/or shorts can be prevented. Accordingly, as compared with prior approaches, the disclosed implementations can facilitate pitch reduction. Such pitch reduction can, in turn, allow for reducing respective sizes of semiconductor device assemblies, which can achieve additional operational and/or product cost savings as a result, such as reduced material costs.

FIG.1is a diagram schematically illustrating an example electroplating system100. The electroplating system100includes a vessel105in which an electrolytic plating solution110is disposed. In some implementations, the electrolytic plating solution110can include methane sulfonic acid (MSA) or equivalent electrolytic solution (such as nickel sulfamate or copper sulfate) and a liquid metal solution, where the liquid metal solution includes a metal, e.g., a liquid plating metal, such as liquid tin, that is used to plateable surfaces, such as exposed metal surfaces, of a workpiece125that are submerged, e.g., disposed, in the electrolytic plating solution110. In some implementations, the electrolytic plating solution110can include one or more additives to facilitate efficient electroplating. Other surface of the workpiece125disposed in the electrolytic plating solution110may be non-plateable, such as molding compound surfaces.

As shown inFIG.1, the electroplating system100includes a sparger115that is disposed within the electrolytic plating solution110in the vessel105. In some implementations, a position of the sparger115within the vessel105can be adjusted, e.g., in the view ofFIG.1, vertically adjusted based on a size of the workpiece125being plated. As indicated by the arrows115ainFIG.1, the sparger115can generate a fluidic flow within the electrolytic plating solution110. This fluidic flow can agitate the electrolytic plating solution110(e.g., to maintain homogeneity of the electrolytic plating solution110and/or to facilitate plating efficiency). In some implementations, the sparger115can create a laminar flow of the electrolytic plating solution110over the workpiece125.

The electroplating system100ofFIG.1includes a cathode terminal120. The cathode terminal120includes a clip120athat is used to physically and electrically couple the cathode terminal120with the workpiece125, e.g., to electrically couple the cathode terminal120with surfaces of the workpiece125to be plated, such as a leadframe strip including a plurality of semiconductor device assemblies, e.g., a strip of block molded device assemblies. While a single clip (clip120a) is shown inFIG.1, in some implementations the cathode terminal120can include a plurality of clips for electrically coupling to the workpiece125, and for positioning the workpiece125within the electrolytic plating solution110.

In the example ofFIG.1, the electroplating system100also includes an anode terminal130disposed on a first side of the workpiece125and the cathode terminal120, and an anode terminal140disposed on a second side of the workpiece125and the cathode terminal120that is opposite the first side. That is, in this view, the anode terminal130is disposed in the electrolytic plating solution110on the left side of the cathode terminal120and the workpiece125, while the anode terminal140is disposed in the electrolytic plating solution110on the right side of the cathode terminal120and the workpiece125.

As shown inFIG.1, a variable power supply135is coupled between the cathode terminal120and the anode terminal130, while a variable power supply145is coupled between the cathode terminal120and the anode terminal140. In this example, the variable power supply135provides a plating current from the anode terminal130to the cathode terminal120for plating plateable surfaces on the left side of the workpiece125, which could also be referred to as a bottom side of the workpiece125in some implementations. The variable power supply145provides a plating current from the anode terminal140to the cathode terminal120for plating plateable surfaces on the right side of the workpiece125, which could also be referred to as a top side of the workpiece125in some implementations. That is, in the electroplating system100, the cathode terminal120is a common cathode terminal for the anode terminal130, the variable power supply135, the anode terminal140and the variable power supply145.

In the electroplating system100, the anode terminal130includes a base portion130aand a soluble portion130bdisposed on the base portion130a, and the anode terminal140includes a base portion140aand a soluble portion140bdisposed on the base portion140a. In this example, the base portion130aand the base portion140acan be formed of a material with low electrical resistance that is not prone to consumption in the electrolytic plating solution110, e.g., during electroplating of the workpiece125. For instance, in some implementations the base portion130aand the base portion140acan each include a titanium anode basket, or an equivalent anode material.

The soluble portion130band the soluble portion140bcan include a solid plating metal, such as tin or other plating metal, which is soluble in the electrolytic plating solution110. Accordingly, the soluble portion130band the soluble portion140b, in this example, are consumed, at least in part, during electroplating of the workpiece125. That is, the soluble portion130band the soluble portion140bprovide consumable plating metal that, in combination with plating metal already in solution in the electrolytic plating solution110, is used to plate plateable surfaces of the workpiece125(and/or other workpieces). Accordingly, at least the soluble portion130bof the anode terminal130and the soluble portion140bof the anode terminal140would be periodically replenished, such as in implementations of the electroplating system100used in semiconductor device assembly manufacturing processes. In some implementations, the base portion130aand the base portion140amay also be periodically replaced, though less frequently than the soluble portion130band the soluble portion140b.

In some implementations, the variable power supply135and the variable power supply145of the electroplating system100can each be a respective variable voltage power supply. In some implementations, the variable power supply135and the variable power supply145can each be a respective variable current power supply, e.g., can each include a variable current source. In this example, respective plating voltages and/or plating currents can be provided by the variable power supply135and the variable power supply145. For instance, the variable power supply135and the variable power supply145can each be adjusted, or configured to provide respective plating currents based on respective areas of plateable surfaces on each side of the workpiece125, e.g., determined based on a ratio of the plateable surfaces area on each side of the workpiece125.

For instance, as an example, if an area of plateable surfaces on the left (bottom) side of the workpiece125is nine times that of an area of plateable surfaces on the right (top) side of the workpiece125, the variable power supply135and the variable power supply145can be adjusted such that the variable power supply135provides a plating current that is nine times greater than a plating current provided by the variable power supply145, such that a current density, e.g., in A/dm2, of the plating current provided by the variable power supply135for plating plateable surfaces on the left (bottom) side of the workpiece125is equal, or approximately equal, to a current density of the plating current provided by the variable power supply145for plating plateable surfaces on the right (top) side of the workpiece125. That is, in the example, the variable power supply135can be adjusted to provide ninety percent of a total plating current in the electroplating system100, while the variable power supply145can be adjusted to provide ten percent of the total plating current. It is noted that the plating current provided by the variable power supply135and the variable power supply145can also plate plateable surfaces that are disposed between the left and right sides of the workpiece125, e.g., edges of a leadframe strip of the workpiece125.

In some implementations, the variable power supply135and the variable power supply145can be variable voltage power supplies that are adjustable to provide respective plating voltages between zero and twenty-four volts (V). In some implementations, the variable power supply135and the variable power supply145can be variable current power supplies that are adjustable to provide respective plating currents between zero and one-hundred-fifty amperes (A). In some implementations, the variable power supply135and the variable power supply145can be configured to allow for adjustment of one of, or both of a provided voltage or a provided current.

FIG.2is a diagram schematically illustrating another example electroplating system200. The electroplating system200includes like elements as the electroplating system100, which are referenced with the same 100 series reference numbers inFIG.2as inFIG.1. Accordingly, for purposes of brevity, those like elements of the electroplating system200are not described again with reference toFIG.2.

In the example ofFIG.2, the electroplating system200also includes an anode terminal230and an anode terminal250that are disposed in the electrolytic plating solution110on a first (left or bottom) side of the workpiece125and the cathode terminal120. The electroplating system200further includes an anode terminal240and an anode terminal260that are disposed in the electrolytic plating solution110on a second (right or top) side of the workpiece125and the cathode terminal120that is opposite the first side.

As shown inFIG.2, a variable power supply235is coupled between the cathode terminal120and the anode terminal230, a variable power supply245is coupled between the cathode terminal120and the anode terminal240, a variable power supply255is coupled between the cathode terminal120and the anode terminal250, and a variable power supply265is coupled between the cathode terminal120and the anode terminal260. In this example, the variable power supply235provides a plating current from the anode terminal230to the cathode terminal120for plating a first portion of plateable surfaces on the left side of the workpiece125. Likewise, the variable power supply255provides a plating current from the anode terminal250to the cathode terminal120for plating a second portion of plateable surfaces on the left side of the workpiece125. For instance, the plating current provided by the variable power supply235can affect plating of plateable surfaces of an upper half of the workpiece125on the left side the workpiece125, while the plating current provided by the variable power supply255can affect plating of plateable surfaces of a lower half of the workpiece125on the left side the workpiece125.

Similarly, the variable power supply245of the electroplating system200provides a plating current from the anode terminal240to the cathode terminal120for plating a first portion of plateable surfaces on the right side of the workpiece125. Likewise, the variable power supply265provides a plating current from the anode terminal260to the cathode terminal120for plating a second portion of plateable surfaces on the right side of the workpiece125. For instance, the plating current provided by the variable power supply245can affect plating of plateable surfaces of an upper half of the workpiece125on the right side the workpiece125, while the plating current provided by the variable power supply265can affect plating of plateable surfaces of a lower half of the workpiece125on the right side the workpiece125. In the electroplating system200, similar to the electroplating system100, the cathode terminal120is a common cathode terminal for the anode terminal230, the variable power supply235, the anode terminal240, the variable power supply245, the anode terminal250, the variable power supply255, the anode terminal260, and the variable power supply265.

In the electroplating system200, the anode terminal230includes a base portion230aand a soluble portion230bdisposed on the base portion230a, the anode terminal240includes a base portion240aand a soluble portion240bdisposed on the base portion240a, the anode terminal250includes a base portion250aand a soluble portion250bdisposed on the base portion250a, and the anode terminal260includes a base portion260aand a soluble portion260bdisposed on the base portion260a. In this example, as with the anodes of the electroplating system100, the base portion230a, the base portion240a, the base portion250a, and the base portion260acan be formed of a material with low electrical resistance that is not prone to consumption in the electrolytic plating solution110, e.g., during electroplating of the workpiece125. For instance, in some implementations the base portions of the anode terminals of the electroplating system200can include respective titanium anode baskets, or equivalent anode materials.

The soluble portions230b,240b,250band260bcan include a solid plating metal, such as tin or other plating metal, which is soluble in the electrolytic plating solution110. Accordingly, the soluble portions of the anode terminals, in this example, are consumed, at least in part, during electroplating of the workpiece125. That is, the soluble portions of the anode terminals230,240,250and260provide consumable plating metal that, in combination with plating metal already in solution in the electrolytic plating solution110, is used to plate plateable surfaces of the workpiece125(and/or other workpieces). Accordingly, at least the soluble portions230b,240b,250band260bof the anode terminals230,240,250and260would be periodically replenished, such as in implementations of the electroplating system200used in semiconductor device assembly manufacturing processes. In some implementations, the base portions230a,240a,250aand260aof the anode terminals230,240,250and260may also be periodically replaced, though less frequently than the soluble portions.

In some implementations, the variable power supplies235,245,255and265of the electroplating system200can each be a respective variable voltage power supply. In some implementations, the variable power supplies235,245,255and265can each be a respective variable current power supply, e.g., can each include a variable current source. In this example, respective plating voltages and/or plating currents can be provided by the variable power supplies235,245,255and265. For instance, the variable power supplies235,245,255and265can each be adjusted, or configured to provide respective plating currents based on respective areas of plateable surfaces on each side of the workpiece125.

For instance, in this example, as in the example ofFIG.1, if an area of plateable surfaces on the left (bottom) side of the workpiece125is nine times larger than an area of plateable surfaces on the right (top) side of the workpiece125, the variable power supply235and the variable power supply255can be adjusted such that they provide a combined plating current (e.g., the plating current of the variable power supply235plus the plating current of the variable power supply255) that is nine times greater than a combined plating current provided by the variable power supply245and the variable power supply265. That is, the variable power supplies of the electroplating system200can provide plating currents such that plating currents with equal, or approximately equal, current density, e.g., in A/dm2, are provided for plating plateable surfaces on the left (bottom) side of the workpiece125and plateable surfaces on the right (top) side of the workpiece125. For instance, in this example, the variable power supply235and the variable power supply255can each be adjusted to respectively provide forty-five percent of a total plating current in the electroplating system200, while the variable power supply245and the variable power supply265can each be adjusted to respectively provide five percent of a total plating current in the electroplating system200. It is noted that the plating currents provided by the variable power supplies235,245,255and265can also plate plateable surfaces that are disposed between the left and right sides of the workpiece125, e.g., edges of leadframe strip of the workpiece125.

In some implementations, the variable power supplies235,245,255and265can be variable voltage power supplies that are adjustable to provide respective plating voltages between zero and twenty-four volts (V). In some implementations, the variable power supplies235,245,255and265can be variable current power supplies that are adjustable to provide respective plating currents between zero and one-hundred amperes (A). In some implementations, the variable power supplies235,245,255and265can each be configured to allow for adjustment of one of, or both of, a provided voltage or a provided current.

FIG.3is a diagram illustrating an example strip300of block molded semiconductor device assemblies viewed from a first (e.g., top) side. By way of example, the strip300can be the workpiece125of the electroplating system100and/or the electroplating system200. Of course, the workpiece125can take other forms, such as other strips of molded semiconductor device assemblies, bare (e.g., unmolded) leadframes, one or more direct bonded metal substrates (e.g., with or without molded portions), etc.

InFIG.3, the view of the strip300can correspond with the right (top) side of the workpiece125as illustrated in the examples ofFIGS.1and2discussed above. For instance, the strip300includes a leadframe strip305, a block molded portion310a, a block molded portion310b, and a block molded portion310c. In this example, each of the block molded portions310a-310ccan each include a plurality of individual semiconductor device assemblies, e.g., approximately nine-hundred per block molded portion in this example. These individual assemblies can be singulated (separated, etc.) into the individual semiconductor device assemblies, e.g., after plating is performed on the strip300using the electroplating system100or the electroplating system200. Such singulation can be performed using a saw, a laser cutter, a plasma cutter, etc.

As shown inFIG.3, the exposed portions of the leadframe strip305disposed around the block molded portions310a-310ccan provide mechanical support for individual leadframes of the strip300, which are also separated from one another during a singulation process. Accordingly, in this example, the exposed portions of the leadframe strip305are plateable surfaces, while the block molded portions310a-310care not plateable surfaces. In some implementations, the leadframe strip305can be electrically coupled with a cathode terminal of an electroplating system, such as the cathode terminal120of the electroplating system100or the electroplating system200, during electroplating of the strip300.

Referring now toFIG.4, an opposite side (e.g., bottom side) of the strip300from the (top) side shown in the view ofFIG.3is illustrated, which shows the individual semiconductor assemblies, e.g., with a single semiconductor assembly indicated by a semiconductor assembly400. Referring toFIG.5, an example pattern of plateable surfaces of the semiconductor assembly400is illustrated. For instance, the example semiconductor assembly400shown inFIG.5includes a signal pad420a, a signal pad420b, a signal pad420c, a signal pad420d, a signal pad420e, a signal pad420f, a signal pad420g, and a signal pad420h, which can be portions of a leadframe (e.g., a copper leadframe) of the semiconductor assembly400included in the leadframe strip305that are exposed through a molding compound410. As also shown inFIG.4, the bottom side of the semiconductor assembly400also includes a die attach paddle425, which can also be included in the leadframe for the semiconductor assembly400as part of the leadframe strip305.

TakingFIGS.4and5together, plateable surfaces of the bottom side of the strip300include exposed portions of the leadframe strip305disposed around each of the block molded portions310a-310c, as well as the signal pads420a-420gand the die attach paddle425of each of the semiconductor assemblies400(e.g., approximately 1800 individual semiconductor device assemblies) of the strip300. Accordingly, an area of the plateable surfaces of the bottom side of the strip300(as shown inFIG.4) is greater than an area of the plateable surfaces of the top side of the strip300(as shown inFIG.3and described above). For instance, in an example implementation the ratio of plateable surface area of the bottom side to plateable surface area of the top side can be nine to one, or could have other ratios, e.g., twenty to one, fifteen to one, ten to one, seven to one, five to one, etc., depending on the particular implementation. Using the approaches described herein, appropriate plating voltages and/or plating currents can be used to affect electroplating of the plateable surfaces of the strip300, and to achieve plating thickness uniformity with a desired tolerance (e.g., 10% variation or less) between the top side plateable surfaces and the bottom side plateable surfaces.

FIG.6is a flowchart illustrating an example method600for electroplating. In this example, the method600can be implemented by the electroplating system200ofFIG.2. Accordingly, for purposes of illustration, the method600is described with further reference toFIG.2. In other implementations, similar methods can be performed by electroplating systems having other configurations. For instance, the electroplating system100could implement a similar method with the operations of blocks650and660being omitted. In other implementations, additional operations can be added to the method600. For instance, additional variable plating voltages and/or currents can be provided by additional variable power supplies. The particular operations of an electroplating method will depend, at least in part, on one or more of the workpiece being plated, the electroplating system used, a ratio of surface areas of plateable surfaces on each side of the workpiece, etc.

The method600ofFIG.6, at block610, includes coupling the workpiece125with the cathode terminal120, e.g., via the clip120a. At block620, the method600includes submerging the workpiece125in the electrolytic plating solution110. The method600includes, at block630, providing, from the anode terminal230, a first plating current, e.g., from the variable power supply235, for plating at least a first portion of plateable surfaces on the left side of the workpiece125(e.g., set at 50% of total plating current to account for clipped area being plated). The method600further includes, at block640, providing, from the anode terminal240, a second plating current, e.g., from the variable power supply245, for plating at least a first portion of plateable surfaces on the right side of the workpiece125(e.g., set at 6% of total plating current to account for clipped area being plated). The method600also includes, at block650, providing, from the anode terminal250, a third plating current, e.g., from the variable power supply255, for plating at least a second portion of plateable surfaces on the left side of the workpiece125(e.g., set at 40% of total plating current). The method still further includes, at block660, providing, from the anode terminal260, a fourth plating current, e.g., from the variable power supply265, for plating at least a second portion of plateable surfaces on the right side of the workpiece125(e.g., set at 4% of total plating current). As described herein, the plating currents of blocks630-660of the method600can be provided by varying a voltage and/or a current of the corresponding variable power supplies.

Some implementations may be implemented using various semiconductor processing and/or packaging techniques. Some implementations may be implemented using various types of semiconductor processing techniques associated with semiconductor substrates including, but not limited to, for example, Silicon (Si), Gallium Arsenide (GaAs), Gallium Nitride (GaN), Silicon Carbide (SiC) and/or so forth.