System for providing a transducer having a main coil and an additional coil separated from the main pole by a write shield

A method and system for providing a magnetic recording head is described. The magnetic recording head has an air-bearing surface (ABS) configured to reside in proximity to a media during use. The head includes a first coil, a second coil, a main pole, and a third coil. The first coil has a first plurality of turns and is configured to carry a first write current in a first direction. The second coil has a second plurality of turns and is configured to carry a second write current in a second direction. The main pole is between the first coil and the second coil. The third coil has a third plurality of turns configured to carry a third write current in a third direction.

BACKGROUND

FIG. 1depicts a portion of a conventional magnetic recording transducer10. For clarity,FIG. 1is not to scale. The conventional transducer10includes a shield12, main pole14, yoke16(otherwise termed an auxiliary pole), coils18and20, write shield/return pole22and back gap24. The coils18and20may together form a helical coil. Alternatively, each coil18and20may be a pancake coil and have a second set of turns (not shown) further from the ABS. Although depicted as above the main pole14(with respect to the substrate that is not shown), the yoke16might be below the main pole14. In operation, a current is driven through the coil(s)18and20to energize the main pole14. As a result, the main pole14writes to the media (not shown).

Although the conventional transducer10may function, it may not be effective at higher data rates. The trend in magnetic recording is to higher areal densities and higher data rates. In the conventional transducer10, the main pole14is driven by coils18and20. However, the write shield22is driven only by the coil20. Thus, the write shield may not be driven at sufficiently high data rates by the coil20. In other words, the write shield22may lag the main pole14. As a result, the transducer10may not be capable of writing at higher data rates. Thus, performance of the conventional transducer10may degrade.

Accordingly, what is needed is a system and method for improving performance of the transducer.

BRIEF SUMMARY OF THE INVENTION

A method and system for providing a magnetic recording head is described. The magnetic recording head has an air-bearing surface (ABS) configured to reside in proximity to a media during use. The head includes a first coil, a second coil, a main pole, and a third coil. The first coil has a first plurality of turns and is configured to carry a first write current in a first direction. The second coil has a second plurality of turns and is configured to carry a second write current in a second direction. The main pole is between the first coil and the second coil. The third coil has a third plurality of turns configured to carry a third write current in a third direction.

DETAILED DESCRIPTION OF THE EMBODIMENTS OF THE INVENTION

FIG. 2is a diagram depicting a side view of a portion of a magnetic recording head100that may reside on a slider (not shown) in a disk drive that also include media (not shown). For clarity,FIG. 2is not to scale. For simplicity not all portions of the head100are shown. In addition, although the head100is depicted in the context of particular components other and/or different components may be used. Further, the arrangement of components may vary in different embodiments. The head100has an ABS configured to reside close to a media (not shown) during operation. The head100is a merged head including a read transducer102and a write transducer110. The read transducer102includes shields104and108as well as read sensor106. In other embodiments, the head100may include only the transducer110.

The write transducer110may be considered to include the shield108. In addition, the transducer110includes main pole112, yoke114(otherwise known as an auxiliary pole), backgap116, write gap118, write shield120that may also be considered to be a return pole, a first coil130, a second coil140, and a third coil150. In some embodiments, the write transducer110may have other magnetic components, such as a wraparound shield or side shields that are not shown. The coils130and140are used to drive the main pole112. Thus, the coils130and140carry current in the opposite direction. As a result, the fields from the coils130and140at the main pole112add. Although the current in coil130is shown into the plane of the page and the current in the coil140is shown out of the plane of the page, other directions are possible. For example, the coil130might carry current into the plane of the page while the coil140carries current out of the plane of the page. In the embodiment shown, the coils130and140are connected, forming a helical coil. In other embodiments, the coils130and140may be pancake coils. In such embodiments, other turns of the coils130and140would reside distal from the ABS. Finally, in an alternate embodiment, each of the coils130and140may be a helical coil with another portion of the coil130and140, respectively residing distal from the main pole112. Finally, both of the coils130and140are shown as having three turns. However, in other embodiments, the coils130and/or140may have a different number of turns.

The write transducer110also includes the third coil150. The third coil has a plurality of turns150A that is proximate to the write shield120and another plurality turns150B away from the write shield120. The third coil may be considered to be a third layer of turns for coil(s) that may be further from a substrate (not shown) than the first coil layer130and the second coil layer140. In some embodiments, the distance from the write shield120to the turns150B, d2, may be at least two microns. In some such embodiments, d2may be 0.5 to three times the yoke length, d1. The turns150A close to the write shield120and ABS carry current. In some embodiments, the turns150A carry current in the same direction as the coil130. In such embodiments, therefore, the turns150B carry current in the opposite direction. In the embodiment shown, the turns150A and150B form a pancake coil150. Thus, the turns150A are proximate to the ABS while the turns150B are distal from the ABS inFIG. 2. In the embodiment shown, the turns150A are substantially the same distance from the write shield120as the coil140. However, in other embodiments, the turns150A may be a different distance from the write shield120than the coil. In some embodiments, the coil150may be a helical coil. If wound in series with coils130and140and coil140has n turns, then the total number of turns in coils130and150is n−1, n, or n+1. However, in other embodiments, the helical coil150may be wound separately from the coils130and140.

In operation, the coils130and140are energized and drive the main pole112, which writes to the media (not shown). The direction of current in each of the coils130and140generally depends upon the data to be written. However, the write current in one coil130is opposite to the write current in the other coil140. Thus, the magnetic fields from the coils130and140are in substantially the same direction and add in the region of the main pole112. Stated differently, both coils120and130drive the main pole112. In addition, the coil150carries a current during writing. The current in the turns150A of the coil150is opposite to the current in the coil140. In addition, the current in the turns150A of the coil150may be less than the current driven in the coil130and/or the coil140. In other embodiments, the current through the coil150may be the same as the current through the coils130and/or140. As a result, the coils130,140, and150may be driven together or separately. Thus, the magnetic fields from the coils140and150are in substantially the same direction and add in the region of the write shield120. Thus, the coils140and150drive the write shield120.

The magnetic recording head100may have improved performance at high data rates. Both the main pole112and the write shield120are driven by two coils. More specifically, the write shield120may be driven by two coils140and150, allowing the response of the write shield120to be improved. Stated differently the write shield120may be more active than reactive. Thus, the write shield120may be less likely to lag the main pole112. Further, use of the additional coil150may allow for a shorter yoke length for the main pole112. For example, the yoke length is the distance from the ABS to the front edge of the backgap116. The conventional head10may have a yoke length on the order of six to seven micrometers or more. In contrast, the magnetic recording head may have a yoke length (d1) of less than six micrometers. Use of the additional coil150may also allow the number of turns in the coil(s)130and/or140to be reduced. For example, the coil130and/or140may have two turns. In such an embodiment, the yoke length may be not more than substantially 3.5 micrometers. A shorter yoke length may allow for reduced resistance and inductance of the coil(s)130and/or140. Thus, performance of the magnetic recording head100may be further improved.

FIG. 3depicts a side view of another exemplary embodiment of a magnetic recording head100′. For clarity,FIG. 3is not to scale. For simplicity not all portions of the magnetic recording head100′ are shown. In addition, although the magnetic recording head100′ is depicted in the context of particular components other and/or different components may be used. Further, the arrangement of components may vary in different embodiments. The magnetic recording head100′ has an ABS configured to reside close to a media (not shown) during operation. The write transducer110′ may be in a merged head including a read transducer and the write transducer110′ or may be in a separate write head. The magnetic recording head100′ is analogous to the magnetic recording head100. Consequently, analogous portions have similar labels. The magnetic recording head100′ thus includes a read transducer102′ and a write transducer110′ that are analogous to the read transducer102and the write transducer110, respectively. The read transducer102′ thus includes shields108′ and104′ and sensor106′ analogous to the components108,104, and106, respectively. The write transducer110′ thus includes the shield108′, coil(s)130′ and140′, main pole112′, yoke114′, backgap116′, write gap118′, write shield120′, and additional coil150′ including turns150A′ and150B′ that are analogous to coil(s)130and140, main pole112, yoke114, backgap116, write gap118, write shield120, and additional coil150including turns150A and150B, respectively. In some embodiments, the transducer110′ may have other magnetic components, such as a wraparound shield or side shields that are not shown.

In the write transducer110′, the coils130′ and140′ are pancake coils. Thus, the coil130′ includes turns130A proximate to the main pole112′ and ABS as well as turns130B distal from the main pole and ABS. Similarly, the coil140′ includes turns140A proximate to the main pole112′ and ABS as well as turns140B distal from the main pole and ABS. The third coil150′ shown is also a pancake coil. However, in other embodiments, the coil150′ may be a helical coil.

The magnetic recording head100′ operates in an analogous manner to and may share the benefits of the magnetic recording head100. In particular, the write transducer110′ may have improved performance at high data rates. Both the main pole112′ and the write shield120′ are driven by two coils. Thus, the response of the write shield120′ may be improved. Further, use of the additional coil150′ in another layer than the coils130′ and140′ may allow for a shorter yoke length for the main pole112′. For example, the magnetic recording head100′ may have a yoke length (included as part of d1′) of less than six micrometers. Use of the additional coil150′ may also allow the number of turns in the coil(s)130′ and/or140′ to be reduced. In some such embodiments, the yoke length may be less than six micrometers. In some such embodiments, the yoke length is not more than substantially 3.5 micrometers. A shorter yoke length may allow for reduced resistance and inductance of the coil(s)130′ and/or140′. Thus, performance of the magnetic recording head100′ may be further improved.

FIG. 4depicts a side view of another exemplary embodiment of a magnetic recording head100″. For clarity,FIG. 4is not to scale. For simplicity not all portions of the magnetic recording head100′ are shown. In addition, although the magnetic recording head100″ is depicted in the context of particular components other and/or different components may be used. Further, the arrangement of components may vary in different embodiments. The magnetic recording head100″ has an ABS configured to reside close to a media (not shown) during operation. The write transducer110″ may be in a merged head including a read transducer and the write transducer110″ or may be in a separate write head. The magnetic recording head100″ is analogous to the magnetic recording heads100and100′. Consequently, analogous portions have similar labels. The magnetic recording head100″ thus includes a read transducer102″ and a write transducer110″ that are analogous to the read transducer102/102′ and the write transducer110/110′, respectively. The read transducer102″ thus includes shields108″ and104″ and sensor106″ analogous to the components108/108′,104/104′, and106/106′, respectively. The write transducer110″ thus includes the shield108″, coil(s)130″ and140″, main pole112″, yoke114″, backgap116″, write gap118″, write shield120″, and additional coil150″ including turns150A″ and150B″ that are analogous to coil(s)130/130′ and140/140′, main pole112/112′, yoke114/114′, backgap116/116′, write gap118/118′, write shield120/120′, and additional coil150/150′ including turns150A/150A′ and150B/150B′, respectively. In some embodiments, the transducer110″ may have other magnetic components, such as a wraparound shield or side shields that are not shown.

In the write transducer110″, the coils130″ and140″ form a helical coil. In other embodiments, the coils130″ and/or140″ may be pancake coils. Further, the number of turns of the coil130″ has been reduced. In another embodiment, the number of turns for the coil140″ may also be reduced. The third coil150″ is a pancake coil. However, in other embodiments, the coil150″ may be a helical coil.

The magnetic recording head100″ operates in an analogous manner to and may share the benefits of the magnetic recording heads100and100′. In particular, the write transducer110″ may have improved performance at high data rates. Both the main pole112″ and the write shield120″ are driven by two coils. Thus, the response of the write shield120″ may be improved. Further, use of the additional coil150″ in another layer than the coils130″ and140″ may allow for a shorter yoke length for the main pole112″ as well as for the reduced number of turns in the coil130″. For example, the magnetic recording head100″ may have a yoke length (included as part of d1″) of less than six micrometers. Use of the additional coil150″ may also allow the number of turns in the coil(s)130″ and/or140″ to be reduced. In the embodiment shown, the number of turns of the coil130″ has been reduced. The yoke may thus be further reduced in length. For example, the yoke length may be less than four micrometers. In some such embodiments, the yoke length is not more than substantially 3.5 micrometers. A shorter yoke length may allow for reduced resistance and inductance of the coil(s)130″ and/or140″. Thus, performance of the magnetic recording head100″ may be further improved.

FIG. 5depicts a side view of another exemplary embodiment of a magnetic recording head100′″. For clarity,FIG. 5is not to scale. For simplicity not all portions of the magnetic recording head100′″ are shown. In addition, although the magnetic recording head100′″ is depicted in the context of particular components other and/or different components may be used. Further, the arrangement of components may vary in different embodiments. The magnetic recording head100′″ has an ABS configured to reside close to a media (not shown) during operation. The write transducer110′″ may be in a merged head including a read transducer and the write transducer110′″ or may be in a separate write head. The magnetic recording head100′″ is analogous to the magnetic recording heads100,100′, and100″. Consequently, analogous portions have similar labels. The magnetic recording head100′″ thus includes a read transducer102′″ and a write transducer110′″ that are analogous to the read transducer102/102′/102″ and the write transducer110/110′/110″, respectively. The read transducer102′″ includes shields108′″ and104′″ and sensor106′″ analogous to the components108/108′/108″,104/104′/104″, and106/106′/106″, respectively. The write transducer110′″ includes the shield108′″, coil(s)130′″ and140′″, main pole112′″, yoke114′″, backgap116′″, write gap118′″, write shield120′″, and additional coil150′″ including turns150A′″ and150B′″ that are analogous to coil(s)130/130′/130″ and140/140′/140″, main pole112/112′/112″, yoke114/114′/114″, backgap116/116′/116″, write gap118/118′/118″, write shield120/120′/120″, and additional coil150/150′/150″ including turns150A/150A′/150A″ and150B/150B′/150B″, respectively. In some embodiments, the transducer110′″ may have other magnetic components, such as a wraparound shield or side shields that are not shown.

In the write transducer110′″, the coils130′″ and140′″ form a helical coil. In other embodiments, the coils130′″ and/or140′″ may be pancake coils. The third coil150′″ is a pancake coil. In other embodiments, the coil150′″ may be a helical coil in which turns150B′″ are distal from the write shield120′″, but closer to the ABS. In addition, the third coil150′″ has a different number of turns than the coils130′″ and140′″. In the embodiment shown, the third coil150′″ has fewer turns than the coils130′″ and140′″. However, in other embodiments the third coil150′″ may have a different number of turns, including more turns than the coils130′″ and140′″. Further, the coils130′″ and/or140′″ may have a different number of turns.

The magnetic recording head100′″ operates in an analogous manner to and may share the benefits of the magnetic recording heads100,100′, and100″. In particular, the write transducer110′″ may have improved performance at high data rates. Both the main pole112′″ and the write shield120′″ are driven by two coils. Thus, the response of the write shield120′″ may be improved. Further, use of the additional coil150′″ in another layer than the coils130′″ and140′″ may allow for a shorter yoke length for the main pole112′″ as well as for the reduced number of turns in the coil130′″. For example, the magnetic recording head100′″ may have a yoke length (included as part of d1′″) of less than six micrometers. Use of the additional coil150′″ may also allow the number of turns in the coil(s)130′″ and/or140′″ to be reduced. In some such embodiments, the yoke length may be less than four micrometers. In some such embodiments, the yoke length is not more than substantially 3.5 micrometers. A shorter yoke length may allow for reduced resistance and inductance of the coil(s)130′″ and/or140′″. Thus, performance of the magnetic recording head100′″ may be further improved.

FIG. 6depicts a side view of another exemplary embodiment of a magnetic recording head100″″. For clarity,FIG. 6is not to scale. For simplicity not all portions of the magnetic recording head100″″ are shown. In addition, although the magnetic recording head100″″ is depicted in the context of particular components other and/or different components may be used. Further, the arrangement of components may vary in different embodiments. The magnetic recording head100″″ has an ABS configured to reside close to a media (not shown) during operation. The write transducer110″″ may be in a merged head including a read transducer and the write transducer110″″ or may be in a separate write head. The magnetic recording head100″″ is analogous to the magnetic recording heads100,100′,100″ and100′″. Consequently, analogous portions have similar labels. The magnetic recording head100″″ thus includes a read transducer102″″ and a write transducer110″″ that are analogous to the read transducer102/102′/102″/1102′″ and the write transducer110/110′/110″/110′″, respectively. The read transducer102″″ includes shields108″″ and104″″ and sensor106″″ analogous to the components108/108′/108″/108′″,104/104′/104″/104′″, and106/106′/106″/106′″, respectively. The write transducer110″″ includes the shield108″″, coil(s)130″″ and140″″, main pole112″″, yoke114″″, backgap116″″, write gap118″″, write shield120″″, and additional coil150″″ including turns150A″″ and150B″″ that are analogous to coil(s)130/130′/130″/130′″ and140/140′/140″/140′″, main pole112/112′/112″/112′″, yoke114/114′/114″/114′″, backgap116/116′/116″/116′″, write gap118/118′/118″/118′″, write shield120/120′/120″/120′″, and additional coil150/150′/150″/150′″ including turns150A/150A′/150A″/150A′″ and150B/150B′/150B″/150′″, respectively. In some embodiments, the transducer110″″ may have other magnetic components, such as a wraparound shield or side shields that are not shown.

In the write transducer110″″, the coils130″″ and140″″ form a helical coil. In other embodiments, the coils130″″ and/or140″″ may be pancake coils. The third coil150″″ is a pancake coil. In other embodiments, the coil150′″ may be a helical coil.

In addition, the write transducer110″″ includes optional additional coils160and170. In some embodiments, only the coil160is provided. In other embodiments, only the coil170is present. In other embodiments, both coils160and170are present. The coils160and170are pancake coils for which one turn is shown. The remainder of the coils160and170, which would reside distal from the ABS in a manner similar to the coil150″″, are not shown. In other embodiments, the coils160and170might form an additional helical coil. The coil160resides on the same side of the main pole112″″ as the coil130″″. The coil160thus carries current in the same direction as the coil130″″. Similarly, the coil170resides on the same side of the main pole112″″ as the coil140″″. The coil170thus carries current in the same direction as the coil140″″. Although the coil160is shown as between the coil130″″ and the main pole112′″, the coil130″″ might reside between the main pole112″″ and the coil160. Similarly, although the coil170is shown as between the coil140″″ and the main pole112′″, the coil140″″ might reside between the main pole112″″ and the coil170. Thus, additional coil(s)160and/or170used in driving the main pole112″″ may be provided.

The magnetic recording head100′″ operates in an analogous manner to and may share the benefits of the magnetic recording heads100,100′,100″, and100′″. In particular, the write transducer110″″ may have improved performance at high data rates. Both the main pole112″″ and the write shield120″″ are driven by at least two coils. Thus, the response of the write shield120″″ may be improved. Further, use of the additional coil150″″ in another layer than the coils130″″ and140″″ may allow for a shorter yoke length for the main pole112″″ as well as for the reduced number of turns in the coil130″″. For example, the magnetic recording head100″″ may have a yoke length (included as part of d1″″) of less than six micrometers. Use of the additional coil150″″ may also allow the number of turns in the coil(s)130″″ and/or140″″ to be reduced. In some such embodiments, the yoke length may be less than six micrometers. In some such embodiments, the yoke length is not more than substantially 3.5 micrometers. A shorter yoke length may allow for reduced resistance and inductance of the coil(s)130″″ and/or140″″. Thus, performance of the magnetic recording head100″″ may be further improved.

FIG. 7depicts a side view of another exemplary embodiment of a magnetic recording head200. For clarity,FIG. 7is not to scale. For simplicity not all portions of the magnetic recording head200are shown. In addition, although the magnetic recording head200is depicted in the context of particular components other and/or different components may be used. Further, the arrangement of components may vary in different embodiments. The magnetic recording head200has an ABS configured to reside close to a media (not shown) during operation. The write transducer210may be in a merged head including a read transducer202and the write transducer210or may be in a separate write head. The magnetic recording head200is analogous to the magnetic recording heads100,100′,100″,100′″, and100″″. Consequently, analogous portions have similar labels. The magnetic recording head200thus includes a read transducer202and a write transducer210that are analogous to the read transducer102/102′/102″/102′″/102″″ and the write transducer110/110′/110″/110′″/110″″, respectively. The read transducer202includes shields208and204and sensor206analogous to the components108/108′/108″/108′″/108″″,104/104′/104″/104′″/104″″, and106/106′/106″/106′″/106″″, respectively. The write transducer210includes the shield208, coil(s)230and240, main pole212, yoke214, backgap216, write gap218, write shield220, and additional coil250including turns250A and250B that are analogous to coil(s)130/130′/130″/130′″/130″″ and140/140′/140″/140″″, main pole112/112′/112″/112′″/112″″, yoke114/114′/114″/114′″/114″″, backgap116/116′/116″/116′″/116″″, write gap118/118′/118″/118′″/118″″, write shield120/120′/120″/120′″/120″″, and additional coil150/150′/150″/150′″/150″″ including turns150A/150A′/150″/150′″/150″″ and150B/150B′/150B″/150B′″/150B″″, respectively. The transducer210also has a yoke length D1that is analogous to the yoke lengths d1, d1′, d1″, d1′″, and d1″″. Similarly, the transducer210has a coils250B a distance D2from the backgap216that is analogous to the distance d2, d2′, d2″, d2′″, and d2″″. In some embodiments, the transducer210may have other magnetic components, such as a wraparound shield or side shields that are not shown.

In the write transducer210, the coils230and240may form a helical coil. In other embodiments, the coils230and/or240may be pancake coils. The third coil250is a pancake coil. In other embodiments, the coil250may be a helical coil in which turns250B are distal from the write shield220, but closer to the ABS. In addition, the third coil250has a different number of turns than the coils230and240. In the embodiment shown, the third coil250has the same number of turns as the coils230and240. However, in other embodiments the third coil250may have a different number of turns, including more or less turns than the coils230and/or240. Further, the coils230and/or240may have a different number of turns.

The write transducer210also includes an additional shield260. In the embodiment shown, the shield260is recessed from the ABS. However, in other embodiments, the shield260may extend to the ABS. The turns250A reside between the shield260and the write shield220. Thus, the coil250still aids in driving the write shield220. In addition, the presence of the additional shield260further aids in magnetically shielding regions of the media (not shown) from being inadvertently written by the transducer210.

The magnetic recording head200operates in an analogous manner to and may share the benefits of the magnetic recording heads100,100′,100″,100′″, and100″″. In particular, the write transducer210may have improved performance at high data rates. Both the main pole212and the write shield220are driven by two coils. Thus, the response of the write shield220may be improved. Further, use of the additional coil250in another layer than the coils230and240may allow for a shorter yoke length for the main pole212as well as for the reduced number of turns in the coil230. For example, the magnetic recording head200may have a yoke length D1of less than six micrometers. Use of the additional coil250may also allow the number of turns in the coil(s)230and/or240to be reduced. For example, the number of turns of the coil230and/or240may be two. In some such embodiments, the yoke length is not more than substantially 3.5 micrometers. A shorter yoke length may allow for reduced resistance and inductance of the coil(s)230and/or240. In addition, the presence of the shield260may reduce inadvertent writing of other portions of the media (not shown). Thus, performance of the magnetic recording head200may be further improved.

FIG. 8depicts a side view of another exemplary embodiment of a magnetic recording head200′. For clarity,FIG. 8is not to scale. For simplicity not all portions of the magnetic recording head200′ are shown. In addition, although the magnetic recording head200′ is depicted in the context of particular components other and/or different components may be used. Further, the arrangement of components may vary in different embodiments. The magnetic recording head200′ has an ABS configured to reside close to a media (not shown) during operation. The write transducer210′ may be in a merged head including a read transducer202′ and the write transducer210′ or may be in a separate write head. The magnetic recording head200′ is analogous to the magnetic recording heads100,100′,100″,100′″,100″″, and200. Consequently, analogous portions have similar labels. The magnetic recording head200′ thus includes a read transducer202′ and a write transducer210′ that are analogous to the read transducer102/102′/102″/102′″/102″″/202and to the write transducer110/110′/110″/110′″/110″″/210, respectively. The read transducer202′ includes shields208′ and204′ and sensor206′ analogous to the components108/108′/108″/108′″/108″″/208,104/104′/104″/104′″/104″″/204, and106/106′/106″/106′″/106″″/206, respectively. The write transducer210′ includes the shield208′, coil(s)230′ and240′, main pole212′, yoke214′, backgap216′, write gap218′, write shield220′, additional coil250′ including turns250A′ and250B′, and additional shield260′ that are analogous to coil(s)130/130′/130″/130′″/130″″/230and140/140′/140″/140′″/140″″/240, main pole112/112′/112″/112′″/112″″/212, yoke114/114′/114″/114′″/114″″/214, backgap116/116′/116″/116′″/116″″/216, write gap118/118′/118″/118′″/118″″/218, write shield120/120′/120″/120′″/120″″/220, additional coil150/150′/150″/150′″/150″″/250including turns150A/150′/150″/150A′″/150A″″/250A and150B/150B′/150B″/150B′″/150B″″/250B, and shield260, respectively. In some embodiments, the transducer210′ may have other magnetic components, such as a wraparound shield or side shields that are not shown.

In the write transducer210′, the coils230′ and240′ may form a helical coil. In other embodiments, the coils230′ and/or240′ may be pancake coils. The third coil250′ is a helical coil having turns250A′ and250B′. The turns250A′ are between the shields220′ and260′. The shield260′ is between the turns250B′ and the shield220′. In other embodiments, the helical coil250may include only turns250A′ that are wrapped along with the helical coil formed by coils230′ and240′. In such an embodiments, the number of turns in the coil250A plus the number of turns in the coil230′ is equal to or within one turn of the number of turns in the coil240′.

The magnetic recording head200′ operates in an analogous manner to and may share the benefits of the magnetic recording heads100,100′,100″,100′″,100″″, and200. In particular, the write transducer210′ may have improved performance at high data rates. More specifically, the response of the write shield220′ may be improved. Further, use of the additional coil250′ in another layer than the coils230′ and240′ may allow for a shorter yoke length for the main pole212′ as well as for the reduced number of turns in the coil230′. A shorter yoke length may allow for reduced resistance and inductance of the coil(s)230′ and/or240′. In addition, the presence of the shield260′ may reduce inadvertent writing of other portions of the media (not shown). Thus, performance of the magnetic recording head200′ may be further improved. Further, it is noted that one or more of the features of the transducers110,110′,110″,110′″,110″″,210, and/or210′ may be combined. Thus, performance of the transducer110,110′,110″,110′″,110″″,210, and/or210′ may be further enhanced.

FIG. 9depicts a diagram depicting another exemplary embodiment of a method for fabricating a PMR transducer200″. For clarity,FIG. 9is not to scale. For simplicity not all portions of the magnetic recording head200″ are shown. In addition, although the magnetic recording head200″ is depicted in the context of particular components other and/or different components may be used. Further, the arrangement of components may vary in different embodiments. The magnetic recording head200″ has an ABS configured to reside close to a media (not shown) during operation. The write transducer210″ may be in a merged head including a read transducer202″ and the write transducer210″ or may be in a separate write head. The magnetic recording head200″ is analogous to the magnetic recording heads100,100′,100″,100′″,100″″,200and200′. Consequently, analogous portions have similar labels. The magnetic recording head200″ thus includes a read transducer202″ and a write transducer210″ that are analogous to the read transducer102/102′/102″/102′″/102″″/202and to the write transducer110/110′/110″/110′″/110″″/210, respectively. The read transducer202″ includes shields208″ and204″ and sensor206″ analogous to the components108/108′/108″/108′″/108″″/208,104/104′/104″/104′″/104″″/204, and106/106′/106″/106′″/106″″/206, respectively. The write transducer210″ includes the shield208″, coil(s)230″ and240″, main pole212″, yoke214″, backgap216″, write gap218″, write shield220″, additional coil250″ including turns250A″ and250B″, and additional shield260″ that are analogous to coil(s)130/130′/130″/130′″/130″″/230and140/140′/140″/140′″/140″″/240, main pole112/112′/112″/112′″/112″″/212, yoke114/114′/114″/114′″/114″″/214, backgap116/116′/116″/116′″/116″″/216, write gap118/118′/118″/118′″/118″″/218, write shield120/120′/120″/120′″/120″″/220, additional coil150/150′/150″/150′″/150″″/250including turns150A/150A′/150A″/150A′″/150A″″/250A and150B/150B′/150B″/150B′″/150B″″/250B, and shield260, respectively. In some embodiments, the transducer210″ may have other magnetic components, such as a wraparound shield or side shields that are not shown. Further, Applicant notes that in the embodiment shown, the additional shield260″ extends to the ABS.

FIG. 10depicts an exemplary embodiment of a method300of forming a portion of a magnetic recording head. For simplicity, some steps may be omitted, combined, interleaved, and/or performed in another sequence. The method300is described in the context of the magnetic recording head100and write transducer110. However, the method300may be used to fabricate other heads and other transducers such as the transducers110′,110″,110′″,210and/or210′. In addition, the method300is described in the context of fabricating a single transducer100. However, multiple transducers may be fabricated substantially in parallel. The steps of the method300typically include multiple substeps.

The first coil130is provided, via step302. Step302may include depositing and patterning the coil130. The main pole112including is provided, via step304. The yoke114, backgap116and other features may also be fabricated. The second coil140is also provided, via step306. Step306may be part of patterning the layer(s) for the second coil240. The write shield120may be provided, via step308. The third coil150is also provided, via step310. Step310may include depositing, patterning, and insulating the turns150A and/or150B. An additional shield, such as the shield260, may also be fabricated, via step312. Fabrication of the transducer100may then be completed, via step314.

Using the method300, the transducers110,110′,110″,110′″,210, and/or210′ may be obtained. Consequently, the benefits of such devices may be achieved.