TW201540421A - Wavy-patterned monowire for cutting - Google Patents

Abstract

The invention relates to a wavy-patterned monowire for cutting hard material such as hard glass, semiconductors and superhard alloy. The wavy-patterned monowire for cutting can maintain the performance of an abraser and improve cutting workability and the quality of a cut surface.

Description

Corrugated monofilament wire for cutting

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a corrugated monofilament type steel wire for cutting, and more particularly to a corrugated monofilament type steel wire for cutting for cutting a semiconductor ingot, ceramic, glass or the like.

A wafer made of 矽 (solar cell substrate, etc.), quartz (used in various industrial fields such as automobiles), gallium arsenide (high-frequency electronic product), etc. is an ingot cut into a cylindrical state. Formed after forming a thin disk. The cutting mechanism of the ingot is to cut the object to be cut by using an abrasive and a wire. At this time, a conventional wire which functions as an abrasive carrier is a brass-plated monofilament-type steel wire, and recently, a product for processing the wire surface to improve the cutting energy to improve the ability of the abrasive carrier has been developed.

As an example, Japanese Laid-Open Patent Publication No. 2011-189444 discloses a technique in which a wire surface is etched by electrolytic decomposition to form a groove at a certain interval and an abrasive is introduced into a groove to elevate an abrasive carrier, but a wire produced by the method is used. However, after a certain period of time, the effect of the abrasive cannot be maintained for a long time due to surface abrasion and disappears.

Japanese Laid-Open Patent Publication No. 2012-139743 discloses the saw wire (1) shown in Fig. 1, and the wave height of the ripple is 0.20 when the wire diameter is d. h/d 0.35, the pitch of the corrugations (p) is 10 p/d The corrugations formed by the apex portions (2, 3) of 14 are continuously formed on a single plane, giving a two-dimensional corrugated shape.

Japanese Laid-Open Patent Publication No. 2008-114318 discloses a small-diameter high-tensile high-carbon steel wire saw wire for a wire saw shown in Fig. 2, which has the following features: 1) a cross-sectional shape having a corner portion The rectangular shape of the rounded corner has an aspect ratio of 2 or more, 2) the thickness of the short side is 200 m or less, and 3) the long side surface is continuously corrugated in a range in which the upper and lower wave heights (H) are twice or less the thickness of the short side (D). .

Although this prior art slightly improves the performance of the abrasive carrier, it usually takes a lot of time to reduce the manufacturing processability and increase the production cost, and the performance of the abrasive carrier decreases with the use process.

In order to solve the above problems of the prior art, it is an object of the present invention to provide an improved corrugated monofilament type steel wire for cutting which has excellent abrasive carrier properties and ingot cutting performance to improve the ingot cutting speed and can provide a stable object to be cut. Surface quality.

Another object of the present invention is to provide a wave for cutting The monofilament type steel wire has excellent cutting performance and excellent elongation characteristics required for cutting, and can improve the cutting speed and provide excellent surface quality of the object to be cut, and minimize the deterioration of the performance of the abrasive carrier.

In order to achieve the above object, an embodiment of the present invention provides a corrugated monofilament type steel wire for cutting, which is composed of a single metal wire having a diameter of d plated with carbon steel and is imparted in the longitudinal direction. a corrugated monofilament type steel wire for cutting a plurality of corrugations, characterized in that the corrugations are arranged in one or more planes, and the diameter (d) and the elongation factor (ε) of the monofilament type steel wire to which the corrugations are applied The height (h) of the corrugation and the period (P) of the corrugation are in accordance with the following conditions: 0.1 (mm) ε x P(mm) 15 (mm)

0.15xh(mm) ε xd(mm) 0.75xh(mm)

In the above formula, ε (extension factor) represents a ratio of elongation to elongation at break of 5 to 30 N.

The above-described cutting monofilament type steel wire of the present invention is rotated on the three-dimensional coordinates on which the corrugations are formed toward the other one of the axes other than the axis in which the corrugated two-dimensional plane is formed, so as to be on a plane more than the plane in which the corrugation is actually formed. Give ripples.

Another aspect of the present invention which achieves the above object provides the following corrugated monofilament type steel wire for cutting comprising a corrugated section having one or more corrugations and a non-corrugated section having no corrugation, the corrugated section The corrugated section is repeated with a length ratio of 9:1 to 1:9.

The corrugated monofilament type steel wire for cutting according to the present invention forms a three-dimensional corrugation in which the elongation factor, the diameter of the monofilament type steel wire, the height of the corrugation, and the period are within the range of the present invention, and therefore, not only is sufficient to contain the abrasive. The groove can also maintain the elongation characteristics required for the cutting line and improve the performance of the abrasive carrier to improve the cutting speed and the efficiency of the cutting process.

Moreover, since the performance of the abrasive carrier is improved to reduce the abrasion of the corrugated monofilament type steel wire, the life performance of the corrugated monofilament type steel wire for cutting of the present invention is improved, since the corrugation is formed in a plurality of planes or forms a rotating three-dimensional corrugation, Not only can the cutting process be stabilized, but also the surface quality of the cut portion can be improved. Therefore, the corrugated monofilament type steel wire of the present invention is suitable for cutting a hard material such as an ingot for a semiconductor, a ceramic, and a super hard alloy, and in particular, can be sufficiently applied to a surface having excellent surface quality and high precision. Hard material cutting applications.

1‧‧‧Saw line

2‧‧‧Vertex

3‧‧‧Vertex

10, 10'‧‧‧ ripple section

100‧‧‧Corrugated monofilament wire for cutting

100a‧‧‧Metal material line

10a, 10a'‧‧‧ ripple

20‧‧‧Non-corrugated section

Fig. 1 is a schematic view of a conventional cutting wire.

Fig. 2 is a longitudinal sectional view of a prior art cutting wire.

Fig. 3 is a side elevational view showing a corrugated monofilament type wire for dicing according to an embodiment of the present invention.

Fig. 4 is a schematic perspective view showing a corrugated monofilament type wire for cutting according to another embodiment of the present invention.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Prior to the description of the present invention, a detailed description of well-known structures or functions may be omitted if it is not necessary to obscure the gist of the present invention.

The corrugated monofilament type steel wire for dicing of the present invention is a corrugated monofilament type steel wire which is composed of a single metal wire having a diameter of d and is plated with carbon steel and having a plurality of corrugations in the longitudinal direction, and the corrugated wire is disposed at One or more planes, the diameter (d), the elongation factor (ε), the height (h) of the corrugation, and the period (P) of the corrugation imparted to the corrugated wire are in accordance with the following formula :0.1 (mm) ε x P(mm) 15 (mm)

0.15xh(mm) ε xd(mm) 0.75xh(mm)

In the above formula, ε (extension factor) represents a ratio of elongation to elongation at break of 5 to 30 N.

The cutting corrugated monofilament type steel wire of the present invention, an abrasive such as a tantalum carbide powder or a diamond powder, and a cutting fluid mixed with a lubricant such as oil are brought into contact with the object to be cut with an appropriate pressure to cut the object to be cut. A method of forming a wafer by cutting a hard material such as a workpiece with a corrugated monofilament type wire for cutting according to the present invention is as follows. In a multi-slot After the plurality of rollers crimp a series of corrugated monofilament-type steel wires for cutting at a preset pitch, the series of cutting corrugated monofilament-type steel wires are driven. The object to be cut that is to be cut is pressurized with a predetermined force on the series of corrugated monofilament-type steel wires for cutting. At the same time, the cutting fluid is allowed to flow between the corrugated monofilament-type wire row for cutting and the object to be cut, and the object to be cut is cut by the cutting action of the polishing particles to form a wafer.

Fig. 3 is a side elevational view showing a corrugated monofilament type wire for cutting according to an embodiment of the present invention. Referring to Fig. 3, the corrugated monofilament type wire (100) for cutting of the present invention has plating for improving the adhesion of the abrasive to the surface of a metal material wire (100a) such as steel of high carbon steel or an element containing tungsten or copper. A structure of a metal plating layer (not shown) such as copper or brass. The corrugated monofilament type steel wire for dicing of the present invention has a carbon content of about 0.70% to 1.05% and a tensile strength of 300 kg/mm ² to 600 kg/mm ² . The above-mentioned monofilament type steel wire has an elongation of 0.8 to 2.1% at 10 to 40 N and a tensile elongation at break of 1.8 to 3.0%.

On the other hand, the reason why the strength of the corrugated monofilament type steel wire for cutting according to the present invention is limited to 300 kg/mm ² to 600 kg/mm ² is to secure the cutting force required for the original purpose of the corrugated monofilament type wire for cutting. Its original purpose was to cut and slice hard materials such as semiconductors, ceramics or superhard alloys. Moreover, in order to obtain the required strength of the corrugated monofilament type steel wire for cutting as a very fine object, it is possible to perform not only drawing processing with a degree of processing of 90% or more, but also adding chromium or vanadium to the raw material as needed. Alloying elements increase strength.

The copper content in the brass plating layer is preferably 60 to 80%, and a third element such as Co, Fe, or Ni may be added to the brass plating layer in a range of 0.1 to 6.0% as needed. The ternary alloy plating layer can improve corrosion resistance and strength.

The corrugated monofilament type steel wire of the present invention contains an abrasive in the corrugated portion to improve the performance of the abrasive carrier. In the present invention, the corrugations of the monofilament type steel wire are disposed in one or more planes, and the product of the elongation factor (?) of the corrugated monofilament type steel wire and the period (P) of the corrugation is 0.1 or more and 15 or less.

In the present invention, when the ε x P of the corrugated monofilament type steel wire is less than 0.1, the surface quality and productivity of the object to be cut are degraded due to insufficient performance of the abrasive carrier, and the ε x P of the corrugated monofilament type steel wire cannot exceed 15 The softness of the minimum standard required for cutting a monofilament type steel wire causes a decrease in productivity.

The ε xP and ε xd of the corrugated monofilament type steel wire for cutting according to the present invention are between the above ranges, so that the corrugated monofilament type wire for cutting has a groove having a size sufficient to accommodate the abrasive, and at the same time, the cutting can be maintained. Elongation characteristics required for corrugated monofilament type steel wires.

The corrugation period narrows the space between the apex portions of the abrasive carrying material when the diameter of the monofilament-type steel wire is too small to limit the performance of the abrasive carrier, and conversely, the corrugation period (P) is compared to the diameter of the monofilament-type steel wire. When the toner is too large, the amount of the apex portion of the corrugation of the object to be cut becomes small. And reduce the cutting speed.

The corrugated monofilament type steel wire for dicing of the present invention preferably has a monofilament type wire diameter (d) of 0.03 mm to 0.5 mm. When the diameter (d) of the monofilament type steel wire is less than 0.03 mm, the strength required for the cutting wire cannot be obtained, and when it exceeds 0.5 mm, the cut loss increases.

One of the factors affecting the yield of a cut object by cutting a wire is kerfloss, which is a cutting groove that occurs when a cutting wire is cut into a cut object such as a twin ingot. Width, cut loss is inversely proportional to yield. In order to minimize the above-described cut, it is necessary to make the wire diameter of the cutting wire thin to achieve thinning or extremely thinning, and for this purpose, an ultrahigh-strength steel wire having high cutting strength and exhibiting high toughness is required. The present invention provides a thin wire diameter cutting corrugation wire having a diameter of 0.5 mm or less in order to reduce the loss of the object to be cut and to increase the cutting speed at the time of cutting.

When the diameter (d) of the monofilament-type steel wire and the height (h) of the corrugation are in accordance with the following formula, the linearity can be easily adjusted and the performance of the abrasive carrier can be improved.

1.2xd (mm) h(mm) 3.0 xd (mm)

In the present invention, the height (h) of the corrugation is too low to ensure a sufficient distance between the workpiece and the abrasive and the performance of the abrasive carrier is degraded compared to the diameter (d) of the monofilament type steel wire, and conversely, The corrugation height (h) is more difficult to be accommodated by a single corrugated surface than the diameter (d) of the monofilament type steel wire is too high to affect the precision of the machined surface. The relationship between the diameter (d) of the above monofilament type steel wire and the height (h) of the corrugation is 1.5 x d (mm) < h (mm) 3.0 xd (mm) is preferred.

The corrugated monofilament type steel wire is rotated on the three-dimensional coordinates on which the corrugations are formed, and is rotated toward the other one of the axes other than the axis in which the corrugated two-dimensional plane is formed, thereby imparting ripple on a plane more than the plane in which the corrugation is actually formed. Effect. For example, referring to Fig. 3, when the corrugations are formed on the X-Y plane, the corrugated monofilament-shaped wires are rotated in the Z-axis direction to exert a corrugation effect in the Y-Z plane direction. The corrugated monofilament type wire for cutting of this embodiment can also form a three-dimensional corrugation without using two sets of corrugation imparting means.

The cutting monofilament type steel wire is corrugated by the corrugation imparting device in a state in which the individual filament-type steel wires themselves are twisted by a pair of twisting means rotating in opposite directions to each other without imparting fine distortion to the two bundles entangled with each other. production. When the rotation of a pair of twisting devices is too large, the two bundles of monofilament-shaped wires are entangled with each other due to excessive distortion, and frequent disconnection occurs. On the contrary, if the rotation is too small, the steel wire material itself may be unevenly distributed. The residual stress affects the linearity. Therefore, it is important to appropriately adjust the amount of rotation of the twisting means so that the monofilament type steel wire itself is twisted without passing the two bundles of the monofilament type steel wires to each other without imparting entanglement to each other before passing through the corrugated sheet imparting means. The angle between the monofilament type steel wire and the corrugation imparting means when the monofilament type steel wire passes through the above-mentioned corrugation imparting means is preferably 0 to 90 degrees. When the present invention forms a corrugation in a plurality of planes, it is not required that the ε x P, ε x d and the number of corrugations formed in the corrugations of the respective planes must be the same.

In still another embodiment of the present invention, the corrugated monofilament type wire for cutting additionally includes an abrasion resistant multilayer coating for improving wear resistance and life performance. The coating layer is composed of one or more materials selected from the group consisting of (Ti, Al, Si) N, (Ti, Si) N, (Ti, Al) N, and (Al, Cr) N. A wear resistant coating above the layer. As an example of the wear resistant coating, it is possible to contain (Ti, Al, Si) N + (Ti, Si) N, (Ti, Si) N + (Ti, Al) N, (Al, Cr) N + (Ti A multilayer coating of Si)N or (Al,Ti,Si)N+(Al,Cr)N is laminated on the corrugated monofilament type steel wire for cutting. The coating comprising the multilayer structure may be deposited to the substrate by a different PVD process or alternately formed into individual layers.

Fig. 4 is a schematic perspective view showing a form of a corrugated monofilament type wire for cutting according to another embodiment of the present invention. As shown in Fig. 4, the corrugated monofilament type wire (100) for cutting of the present invention comprises a corrugated section (10) having one or more corrugations (10a or 10a') and a non-corrugated section (20) not provided with corrugations. .

As described above, the three-dimensional corrugated monofilament type steel wire including the corrugated section and the non-corrugated section of the present invention has excellent elongation at break and adhesion, almost no residual rotational stress, and excellent linearity. , not only improve the cutting performance, but also improve the manufacturing process.

The corrugated section of the present invention is only required to satisfy the above conditions, and thus the unit corrugated section (10) and the unit non-corrugated section (20) can be arranged in various forms. For example, the corrugated section and the non-corrugated section of the cutting monofilament type steel wire of this embodiment are continuously repeated, the corrugated section is referred to as A, the non-corrugated section is referred to as B, and the A section is the same length as the B section. When you don’t have to be like Like ABABAB, the corrugated section and the non-corrugated section are alternately formed in one section, and a smaller number of non-corrugated sections can be inserted between two or more corrugated sections like AABAABAAB, AAABAAABAAAB.

As another example, the corrugated section (10) and the non-corrugated section (20) may be alternately arranged and the corrugations of the respective corrugated sections are formed in mutually different planes. As an example, referring to Fig. 4, the corrugations 10a form corrugations in the X-Y plane and the corrugations 10' form corrugations in the X-Z plane. Therefore, the corrugated monofilament type wire for cutting maintains a straight state during the cutting process to make the cutting process more stable and to improve the surface quality of the cut portion. At this time, the mutually different angles are not necessarily perpendicular to each other, and may be an acute angle of less than 90 degrees.

In the present invention, the non-corrugated section (20) may be a linear line which is not provided with a corrugation at all, but the height of the corrugation may be in the range of 1.00 to 1.10 times the diameter (d) of the monofilament type steel wire.

In the corrugated monofilament type wire for cutting of the present invention, the unit corrugated section (10) and the unit non-corrugated section (20) are preferably repeated in a length ratio of 9:1 to 1:9, at 8:2. The length to 2:8 is better than the inner iteration, and it is best to repeat it in the length ratio of 7:3 to 3:7.

Moreover, it is preferable that the unit corrugated section (10) and the unit non-corrugated section (20) have a length of 1 mm to 100 mm, and preferably, the period (P) of the corrugations (10a and 10a') is 1 mm to 10 mm. The height (h) of the above corrugation (10a) is 1.2×dmm to 3.0×dmm, and 1.5×dmm<h(mm) 3.0 × dmm is better.

Although the shape of the corrugation is not particularly limited in the present invention, as an example, it may have a zigzag shape or a sinusoidal corrugation shape. Preferably, the corrugated monofilament type wire for cutting of the present invention comprises an abrasive coating such as an abrasive slurry.

The invention is described in detail below with reference to the embodiments, but the following examples are intended to illustrate the invention and are not intended to limit the invention.

Example

Example 1

For the wire rod with a carbon content of 0.70 to 1.05% and a diameter of 5.5 mm, the drawing process is performed twice, followed by heat treatment and brass plating, and finally drawn to a diameter of 0.100 mm to prepare a monofilament type steel wire. Then, a corrugated monofilament type wire for cutting is formed by applying a corrugation to the two planes of the monofilament type steel wire which is finally drawn without the corrugation, and the ε x P is 0.1 and ε x d is 0.15 h. The wire diameter, the corrugation period, the elongation, and the elongation at break of the obtained corrugated monofilament type steel wire for dicing were evaluated, and the results are shown in Table 1 below.

On the other hand, after cutting a twin crystal ingot having a diameter of 150 mm using a slurry composed of silicon carbide, the physical properties and productivity of the crystal were evaluated by the methods described below and the results are shown together in Table 1 below. .

[Physical evaluation method]

*Elongation at break The elongation at break was measured using a tensile tester.

* Surface roughness The surface roughness of the object to be cut was measured on a monofilament type wire using a contact sensor method.

* Cut loss (μm) measured the kerf loss after the cutting operation of the twin ingot, and the relative comparison was made after the case of the 0.13 mm line which was not given the corrugated shape as 100.

* The cutting speed refers to the speed at which a twin ingot having a diameter of 150 mm is cut, and a relative comparison is made with a case where a 0.13 mm line having no corrugated shape is taken as 100.

Example 2

For wire rods with a carbon content of 0.70 to 1.05% and a diameter of 5.5 mm, the drawing process is performed twice and then heat-treated and plated with brass. Finally, the wire is drawn to 0.115 mm and the monofilament-shaped steel wire is prepared. In the same manner as in Example 1, except that ε x P was 0.5 and ε xd was 0.32 h, the corrugated monofilament type wire for dicing was prepared and evaluated for physical properties, and the following Table 1 is shown.

Example 3

Except that ε x P was 1.0 and ε x d was 0.26 h, the other was carried out in the same manner as in Example 2 to prepare a corrugated monofilament type wire for dicing, and various physical properties were evaluated and shown in Table 1 below.

Example 4

Except that ε x P was set to 3.5 and ε xd was 0.23 h, the other was carried out in the same manner as in Example 2 to prepare a corrugated monofilament type wire for dicing, and various physical properties were evaluated and shown in Table 1 below.

Example 5

Except that ε x P was 4.0 and ε xd was 0.52 h, the other was carried out in the same manner as in Example 2 to prepare a corrugated monofilament type wire for dicing, and various physical properties were evaluated and shown in Table 1 below.

Example 6

For the wire with a carbon content of 0.70~1.05% and a diameter of 5.5mm, the drawing process is carried out twice and then heat treated and plated with brass. Finally, the wire is drawn to 0.130 mm and the monofilament type wire is prepared. When the corrugation is given, in addition to ε When x P was 5.0 and ε xd was 0.46 h, the other was carried out in the same manner as in Example 1 to prepare a corrugated monofilament type wire for dicing, and various physical properties were evaluated and shown in Table 1 below.

Example 7

For the wire with a carbon content of 0.70~1.05% and a diameter of 5.5mm, the drawing process is carried out twice and then heat treated and plated with brass. Finally, the wire is drawn to 0.130 mm and the monofilament type wire is prepared. When the corrugation is given, in addition to ε x P is 12.5 and ε xd is 0.75 h, and the rest is carried out in the same manner as in the first embodiment. The corrugated monofilament type steel wire for cutting was prepared and evaluated for various physical properties and listed together in Table 1 below.

Comparative example 1

After the final drawing, the corrugated sheeting device was not used, and the corrugated monofilament type steel wire was not corrugated to any plane of the 0.130 mm diameter wire, and the physical properties of the monofilament type steel wire produced in the example were compared and evaluated, and the results were listed. In Table 2 below.

Comparative example 2

Except that ε x P was 1.7 and ε x d was 0.80 h, the other was carried out in the same manner as in Example 2 to prepare a corrugated monofilament type wire for dicing, and various physical properties were evaluated and shown in Table 2 below.

Comparative example 3

Except that ε x P was 0.04 and ε x d was 0.09 h, the other was carried out in the same manner as in Example 2 to prepare a corrugated monofilament type wire for dicing, and various physical properties were evaluated and shown in Table 2 below.

Comparative example 4

Except that ε x P was changed to 16 and ε x d was changed to 0.48 h, the other was carried out in the same manner as in Example 2 to obtain a corrugated monofilament-type steel wire for dicing, and various physical properties were evaluated and shown in Table 2 below.

Comparative Example 5

Except that ε x P is 25.6 and ε x d is 0.77h, The rest were carried out in the same manner as in Example 2 to prepare a corrugated monofilament type wire for dicing, and various physical properties were evaluated and shown together in Table 2 below.

According to the above Table 1, the surface roughness of the wafer cut using the corrugated monofilament type wire of the present invention is compared with the monofilament type steel wire of the comparative example in which the ratio of the present invention is not given the corrugation or the ratio of ε xP and ε xd It is advantageous and improves the cut of the object being cut. Moreover, in the embodiment of the present invention, the cutting speed of the 150 mm diameter twin ingot is also faster than that of the comparative example. It is possible to increase productivity per unit time and thus reduce production costs.

The present invention has been described in detail above with reference to a preferred embodiment of the present invention, but various modifications and changes may be made without departing from the spirit and scope of the invention. Various modifications and variations are considered to be included in the scope of the present invention.

100‧‧‧Corrugated monofilament wire for cutting

Claims (10)

A corrugated monofilament type steel wire for cutting, which is a corrugated monofilament type wire for cutting which is composed of a single metal wire having a diameter of d and is plated with carbon steel and having a plurality of corrugations in the longitudinal direction, and is characterized in that The corrugations are arranged in one or more planes, and the diameter (d), the elongation factor (ε), the height (h) of the corrugations and the period (P) of the corrugations of the corrugated wire are in accordance with the following formula Conditional composition: 0.1 (mm) ε x P(mm) 15(mm) 0.15xh(mm) ε xd(mm) 0.75 x h (mm) In the formula, ε (extension factor) represents an elongation / elongation at break of 5 to 30 N. The corrugated monofilament type wire for cutting according to claim 1, wherein the monofilament type wire is rotated on the three-dimensional coordinate on which the corrugation is formed toward the other one of the axes other than the axis on which the corrugated two-dimensional plane is formed. The corrugations are imparted on more plane than the plane in which the corrugations are actually formed. A corrugated monofilament type wire for cutting according to claim 1, wherein the monofilament type wire comprises a corrugated section and a non-corrugated section having one or more corrugations, the corrugated section and the non-corrugated section It is repeated with a length ratio of 9:1 to 1:9. The corrugated monofilament type wire for cutting according to claim 3, characterized in that the corrugations of the respective corrugated sections are formed on mutually different planes. The corrugated monofilament type wire for cutting according to claim 3, wherein the corrugation height of the non-corrugated section is in the range of 1.00 to 1.10 times the diameter (d) of the monofilament type wire. The corrugated monofilament type steel wire for cutting according to claim 1, wherein the monofilament type steel wire has an elongation at 10 to 40 N of 0.8 to 2.1% and an elongation at break of 1.8 to 3.0%. The corrugated monofilament type wire for cutting according to claim 1, wherein the monofilament type wire has a diameter (d) of 0.03 mm to 0.5 mm. The corrugated monofilament type steel wire for cutting according to claim 1, wherein the monofilament type steel wire has a carbon content of 0.70% to 1.05%, and the copper component in the brass plating is 60 to 80%. The corrugated monofilament type steel wire for cutting according to claim 1, wherein the monofilament type steel wire has a tensile strength of 300 kg/mm ² to 600 kg/mm ² . The corrugated monofilament type wire for cutting according to claim 1, wherein the diameter (d) of the monofilament type wire and the height (h) of the corrugation are in accordance with the following condition: 1.2 x d (mm) h(mm) The corrugated monofilament type steel wire for cutting according to claim 1, wherein the monofilament type steel wire further comprises (Ti, Al, Si) N, (Ti, Si) N, ( One or more layers of an abrasion resistant coating layer composed of one or more materials of a group consisting of Ti, Al)N and (Al,Cr)N.