TW202030749A - Magnetic device and the method to make the same - Google Patents
Magnetic device and the method to make the same Download PDFInfo
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本發明係有關於一種磁性裝置,尤其有關於一種具有由一絕緣導線製成的一線圈的磁性裝置。The present invention relates to a magnetic device, and more particularly to a magnetic device having a coil made of an insulated wire.
習知電子元件如電感器和扼流圈通常通過由一絕緣導線製成的一線圈和一磁性粉末的高壓模塑來製備,以便形成包覆該線圈的一磁性本體。在高壓模塑過程中,磁性粉末的顆粒可能因成型壓力而刺穿絕緣導線的絕緣層,因而使得線圈不能承受較高的壓力。然而,如果在模塑過程中使用一較低的壓力,則磁性本體的密度將會降低且電感器或扼流圈的電感也會下降。如果增加絕緣導線的厚度,則難以纏繞絕緣導線以形成線圈且會使線圈的體積過於龐大。Conventional electronic components such as inductors and chokes are usually prepared by high-pressure molding of a coil made of an insulated wire and a magnetic powder to form a magnetic body covering the coil. During the high-pressure molding process, the particles of magnetic powder may pierce the insulating layer of the insulated wire due to the molding pressure, thus making the coil unable to withstand higher pressure. However, if a lower pressure is used during the molding process, the density of the magnetic body will decrease and the inductance of the inductor or choke will also decrease. If the thickness of the insulated wire is increased, it is difficult to wind the insulated wire to form a coil and the volume of the coil is too large.
因此,業界需要一更好的解決方案來解決上述問題。Therefore, the industry needs a better solution to solve the above problems.
本發明的一目的是添加一覆蓋層(coating layer)以覆蓋一線圈,以防止磁性粉末的顆粒在一模塑過程中刺穿絕緣導線的絕緣層,從而避免線圈短路。An object of the present invention is to add a coating layer to cover a coil to prevent particles of magnetic powder from piercing the insulating layer of the insulated wire during a molding process, thereby avoiding short circuit of the coil.
本發明的一目的是添加一覆蓋層以覆蓋一線圈,以防止絕緣導線的自粘層在一模塑過程中流出。An object of the present invention is to add a covering layer to cover a coil to prevent the self-adhesive layer of the insulated wire from flowing out during a molding process.
本發明的一目的是添加一覆蓋層以覆蓋一線圈,以增加線圈和磁性本體之間的絕緣程度,從而允許線圈承受更高的電壓。An object of the present invention is to add a covering layer to cover a coil to increase the degree of insulation between the coil and the magnetic body, thereby allowing the coil to withstand higher voltage.
本發明的一實施例揭露一種磁性裝置,該磁性裝置包含:一線圈,所述線圈包含一絕緣導線所形成的一複數個繞組,其中該絕緣導線包含一金屬導線和包覆該金屬導線的至少一第一絕緣層,其中所述線圈的至少兩個不同的部分形成一第一空間;一覆蓋層(coating layer),包含一絕緣材料以覆蓋所述線圈的該至少兩個不同的部分並填充至該第一空間中;以及一磁性本體,包含至少一磁性粉末,其中該磁性本體封裝該絕緣導線的該複數個繞組和該覆蓋層。An embodiment of the present invention discloses a magnetic device. The magnetic device includes: a coil including a plurality of windings formed by an insulated wire, wherein the insulated wire includes a metal wire and at least a metal wire covering the metal wire. A first insulating layer, wherein at least two different parts of the coil form a first space; a coating layer, including an insulating material to cover and fill the at least two different parts of the coil Into the first space; and a magnetic body containing at least one magnetic powder, wherein the magnetic body encapsulates the plurality of windings of the insulated wire and the covering layer.
在一實施例中,所述磁性本體具有單一本體,所述單一本體封裝該絕緣導線的該複數個繞組以及該覆蓋層,所述單一本體延伸到所述線圈的中空部位中。In an embodiment, the magnetic body has a single body that encapsulates the plurality of windings of the insulated wire and the covering layer, and the single body extends into the hollow portion of the coil.
在一實施例中,該絕緣導線的相鄰的兩個外部繞組的兩個不同的部分形成該第一空間,其中該覆蓋層覆蓋該絕緣導線的相鄰的兩個外部繞組的兩個不同的部分並延伸到該第一空間中。In an embodiment, two different parts of two adjacent outer windings of the insulated wire form the first space, wherein the covering layer covers two different parts of two adjacent outer windings of the insulated wire Part and extend into the first space.
在一實施例中,該絕緣導線的一繞組的一第一部分和該絕緣導線的一終端部位的一第二部分形成該第一空間,其中該覆蓋層覆蓋所述第一部分以及所述第二部分並延伸到該第一空間中。In an embodiment, a first part of a winding of the insulated wire and a second part of a terminal portion of the insulated wire form the first space, wherein the covering layer covers the first part and the second part And extend into the first space.
在一實施例中,該絕緣導線的一繞組的第一部分和電性連接到該絕緣導線的一終端部位的一引線(lead) 的第二部分形成一第二空間,其中該覆蓋層覆蓋所述第一部分以及所述第二部分並延伸到該第二空間中。In an embodiment, the first part of a winding of the insulated wire and the second part of a lead electrically connected to a terminal portion of the insulated wire form a second space, wherein the covering layer covers the The first part and the second part extend into the second space.
在一實施例中,該覆蓋層覆蓋該複數個繞組的整個外表面。In an embodiment, the covering layer covers the entire outer surface of the plurality of windings.
在一實施例中,所述磁性裝置為一電感器。In one embodiment, the magnetic device is an inductor.
在一實施例中,該絕緣導線僅具有一個絕緣層。In one embodiment, the insulated wire has only one insulation layer.
在一實施例中,該絕緣導線僅具有兩個絕緣層,其中該絕緣導線的該兩個絕緣層為該第一絕緣層和包覆該第一絕緣層的一自粘層。In one embodiment, the insulated wire has only two insulation layers, and the two insulation layers of the insulated wire are the first insulation layer and a self-adhesive layer covering the first insulation layer.
在一實施例中,該覆蓋層包含一聚合物材料。In one embodiment, the cover layer includes a polymer material.
在一實施例中,該覆蓋層包含一樹脂。In one embodiment, the cover layer includes a resin.
在一實施例中,所述磁性本體包含一第一磁性粉末,其中所述第一磁性粉末的D50在17至36微米之間,所述第一磁性粉末的D10在8至26微米之間,所述第一磁性粉末的D90在30至52微米之間。In one embodiment, the magnetic body includes a first magnetic powder, wherein the D50 of the first magnetic powder is between 17 and 36 microns, and the D10 of the first magnetic powder is between 8 and 26 microns. The D90 of the first magnetic powder is between 30 and 52 microns.
在一實施例中,所述磁性本體包含一第一磁性粉末,其中所述第一磁性粉末的D50在8至16微米之間,所述第一磁性粉末的D10在3至6微米之間,所述第一磁性粉末的D90在18至30微米之間。In one embodiment, the magnetic body includes a first magnetic powder, wherein the D50 of the first magnetic powder is between 8 and 16 microns, and the D10 of the first magnetic powder is between 3 and 6 microns. The D90 of the first magnetic powder is between 18 and 30 microns.
本發明的一實施例揭露一種用於形成一磁性裝置的方法,包含:提供一線圈,該線圈包含一絕緣導線的複數個繞組,其中該絕緣導線包含一金屬導線和包覆該金屬導線的至少一第一絕緣層,其中所述線圈的至少兩個不同的部分形成一第一空間;形成一覆蓋層,該覆蓋層包含一絕緣材料以覆蓋所述線圈的該至少兩個不同的部分並填充至該第一空間中;以及形成一磁性本體,該磁性本體包含至少一磁性粉末,其中該磁性本體封裝該絕緣導線的複數個繞組和該覆蓋層。An embodiment of the present invention discloses a method for forming a magnetic device, including: providing a coil including a plurality of windings of an insulated wire, wherein the insulated wire includes a metal wire and at least A first insulating layer, wherein at least two different parts of the coil form a first space; forming a covering layer that includes an insulating material to cover and fill the at least two different parts of the coil Into the first space; and forming a magnetic body which contains at least one magnetic powder, wherein the magnetic body encapsulates a plurality of windings of the insulated wire and the covering layer.
在一實施例中,該覆蓋層是通過將所述絕緣材料滴(dip)到該絕緣導線的該至少兩個不同的部分上而形成,其中所述絕緣材料填充至該第一空間中。In an embodiment, the covering layer is formed by dripping the insulating material onto the at least two different parts of the insulated wire, wherein the insulating material is filled into the first space.
在一實施例中,所述磁性裝置為一電感器。In one embodiment, the magnetic device is an inductor.
在一實施例中,所述絕緣材料包含一黏膠,其中該覆蓋層是通過將所述黏膠以點膠或灌注的方式覆蓋該絕緣導線的該至少兩個不同的部分上而形成,所述黏膠填充至該第一空間中。In one embodiment, the insulating material includes an adhesive, wherein the covering layer is formed by covering the at least two different parts of the insulated wire with the adhesive by dispensing or pouring, so The glue is filled into the first space.
在一實施例中,該絕緣導線僅具有兩個絕緣層,其中該絕緣導線的該兩個絕緣層為該第一絕緣層和包覆該第一絕緣層的一自粘層。In one embodiment, the insulated wire has only two insulation layers, and the two insulation layers of the insulated wire are the first insulation layer and a self-adhesive layer covering the first insulation layer.
在一實施例中,該覆蓋層包含一聚合物材料。In one embodiment, the cover layer includes a polymer material.
在一實施例中,該覆蓋層包含一樹脂。In one embodiment, the cover layer includes a resin.
為使本發明的上述和其他特徵和優點能更明顯易懂,下文特舉實施例,並配合附圖,作詳細說明如下。In order to make the above-mentioned and other features and advantages of the present invention more obvious and understandable, the following embodiments are specially cited in conjunction with the drawings, and the detailed description is as follows.
對於以下描述,D10、D50和D90是用於描述磁性粉末的粒度分佈。D10表示顆粒總數的10%小於D10、D50表示顆粒總數的50%小於D50,D90表示顆粒總數的90%小於D90。For the following description, D10, D50, and D90 are used to describe the particle size distribution of the magnetic powder. D10 means that 10% of the total number of particles is less than D10, D50 means that 50% of the total number of particles is less than D50, and D90 means that 90% of the total number of particles is less than D90.
圖1示出本發明一實施例的一磁性裝置的一剖面圖的一放大視圖,其中該磁性裝置包含一線圈,該線圈包含一絕緣導線的複數個繞組,其中該絕緣導線包含一金屬導線101a和封裝金屬導線101a的至少一第一絕緣層101b,其中絕緣導線的至少兩個不同的部分105、106形成一第一空間102;由一第一絕緣材料製成的一覆蓋層103,其覆蓋線圈的至少兩個不同的部分105、106並填充至第一空間102中;以及一磁性本體104,其中該磁性本體104包含至少一磁性粉末,其中磁性本體104封裝該絕緣導線的複數個繞組和覆蓋層103,以防止磁性粉末的顆粒損壞線圈的該至少一第一絕緣層,從而避免磁性粉末將線圈的絕緣層刺穿而短路。1 shows an enlarged view of a cross-sectional view of a magnetic device according to an embodiment of the present invention, wherein the magnetic device includes a coil, the coil includes a plurality of windings of an insulated wire, and the insulated wire includes a
如圖1所示,覆蓋層103覆蓋線圈,當在壓力下形成磁性本體104時,磁性粉末的顆粒不會在線圈的不同部分之間引起短路。如果磁性裝置中不存在覆蓋層103,則在壓力下形成磁性本體104時,磁性粉末的顆粒可以設置在該第一空間中並將線圈的絕緣層刺穿而短路。As shown in FIG. 1, the
在一實施例中,絕緣導線僅具有一個絕緣層:一第一絕緣層101b。In one embodiment, the insulated wire has only one insulating layer: a first
在一實施例中,絕緣導線僅具有兩個絕緣層:第一絕緣層101b和一第二絕緣層101c。In one embodiment, the insulated wire has only two insulating layers: a first
在一實施例中,第二絕緣層101c可為一自粘層,其中覆蓋層103覆蓋在該自粘層上可防止自粘層在模塑過程中流出。此外,覆蓋層103可進一步將線圈與磁性粉末的顆粒電隔離以避免磁性粉末的顆粒引起線圈的短路。在一實施例中,絕緣導線可以是漆包線,其中漆包線可以具有圓形形狀。在一實施例中,漆包線的金屬導線包括銅。In one embodiment, the second
圖2A示出添加覆蓋層103之前的一線圈201。圖2B示出被覆蓋層103覆蓋之後的線圈201。如圖2B所示,在一實施例中,絕緣導電的兩個相鄰繞組在其間形成第一空間102,其中覆蓋層103的絕緣材料填充至第一空間102中。FIG. 2A shows a
圖2C示出一線圈201,其中絕緣導線的一繞組的一部分206和絕緣導線的一終端部分的一第一部分205形成該第一空間102,其中覆蓋層103的第一絕緣材料填充至第一空間102中以防止磁性粉末的顆粒設置在第一空間102中。2C shows a
在一實施例中, 如圖2D所示,線圈201的複數個繞組的整個外表面由覆蓋層103覆蓋。In an embodiment, as shown in FIG. 2D, the entire outer surface of the plurality of windings of the
在一實施例中,線圈201的複數個繞組的整個外表面和整個內表面由覆蓋層103封裝。In an embodiment, the entire outer surface and the entire inner surface of the plurality of windings of the
在一實施例中,該絕緣導線的一繞組的一第一部分和電性連接到該絕緣導線的一終端部位的一引線的一第二部分形成一第二空間,其中該覆蓋層覆蓋該所述繞組的第一部分和所述引線的第二部分並延伸到所述第二空間中。In an embodiment, a first part of a winding of the insulated wire and a second part of a lead electrically connected to a terminal portion of the insulated wire form a second space, wherein the covering layer covers the The first part of the winding and the second part of the lead extend into the second space.
在一實施例中,絕緣導線僅具有一個絕緣層:第一絕緣層101b。In one embodiment, the insulated wire has only one insulating layer: the first
請注意,覆蓋層103可僅覆蓋線圈中易於被磁性粉末的顆粒引起線圈短路的部分。也就是說,覆蓋層103不必覆蓋線圈201的整個外表面,如圖2C所示。Please note that the covering
在一實施例中,所述至少一第一絕緣層包含兩個絕緣層,其中所述兩個絕緣層由不同的絕緣材料製成。In an embodiment, the at least one first insulating layer includes two insulating layers, wherein the two insulating layers are made of different insulating materials.
在一實施例中,磁性裝置為一電感器。In one embodiment, the magnetic device is an inductor.
在一實施例中,覆蓋層包含一聚合物材料。In one embodiment, the cover layer includes a polymer material.
在一實施例中,覆蓋層包含一樹脂。In one embodiment, the cover layer includes a resin.
在一實施例中,覆蓋層包含一有機材料。In one embodiment, the cover layer includes an organic material.
在一實施例中,磁性本體包含第一磁性粉末和第二磁性粉末,其中第一磁性粉末和第二磁性粉末與一黏性材料混合。In an embodiment, the magnetic body includes a first magnetic powder and a second magnetic powder, wherein the first magnetic powder and the second magnetic powder are mixed with a viscous material.
在一實施例中,其中第一磁性粉末的D50在8至36微米之間而第二磁性粉末的D50在1.0至10微米之間,第一磁性粉末的D10在3至20微米之間而第二磁性粉末的D10在0.5至6微米之間,第一磁性粉末的D90在20至60微米之間而第二磁性粉末的D90在2至12微米之間。In one embodiment, the D50 of the first magnetic powder is between 8 and 36 microns, the D50 of the second magnetic powder is between 1.0 and 10 microns, and the D10 of the first magnetic powder is between 3 and 20 microns. The D10 of the two magnetic powders is between 0.5 and 6 microns, the D90 of the first magnetic powder is between 20 and 60 microns, and the D90 of the second magnetic powder is between 2 and 12 microns.
在一實施例中,磁性本體包含一第一磁性粉末,其中第一磁性粉末的D50在17至36微米之間,第一磁性粉末的D10在8至26微米之間,第一磁性粉末的D90在30至52微米之間。In one embodiment, the magnetic body includes a first magnetic powder, wherein the D50 of the first magnetic powder is between 17 and 36 microns, the D10 of the first magnetic powder is between 8 and 26 microns, and the D90 of the first magnetic powder Between 30 and 52 microns.
在一實施例中,磁性本體包含一第一磁性粉末,其中第一磁性粉末的D50在8至16微米之間,第一磁性粉末的D10在3至6微米之間,第一磁性粉末的D90在18至30微米之間。In one embodiment, the magnetic body includes a first magnetic powder, wherein the D50 of the first magnetic powder is between 8 and 16 microns, the D10 of the first magnetic powder is between 3 and 6 microns, and the D90 of the first magnetic powder Between 18 and 30 microns.
圖3示出根據本發明一實施例的磁性裝置,其中磁性裝置包含:一線圈201,線圈201包含一絕緣導線形成的複數個繞組,其中該絕緣導線包含一金屬導線和至少一第一絕緣層封裝該金屬導線,該絕緣導線可為一合適的形狀,例如一圓線,其中該線圈201的至少兩個不同的部分形成一第一空間102;一覆蓋層103覆蓋線圈201的該至少兩個不同的部分並延伸到第一空間102中;一磁性本體104,由至少一磁性粉末與一黏性材料形成,其中該磁性本體104封裝該線圈201的絕緣導線的複數個繞組。3 shows a magnetic device according to an embodiment of the present invention, wherein the magnetic device includes: a
在一實施例中,該磁性本體104封裝該線圈201的複數個繞組並延伸至線圈201的中空部位中。In an embodiment, the
在一實施例中,該覆蓋層103延伸到線圈201的中空部位中以覆蓋線圈201的一內表面。In an embodiment, the
在一實施例中,一引線(lead)140設置在磁性本體104上並電性連接線圈201。In one embodiment, a
如圖3所示,覆蓋層103覆蓋線圈201,當在壓力下形成磁性本體104時,磁性粉末的顆粒不會在該線圈201的不同部分之間引起短路。如果磁性裝置中不存在該覆蓋層103,則當在壓力下形成磁性本體104時,磁性粉末的顆粒可以設置在第一空間102中而損壞線圈201的絕緣層並導致線圈201的至少兩個不同部分間的短路。As shown in FIG. 3, the
圖4示出用於形成一磁性裝置的一方法之一流程圖,該方法包含:在步驟401中:提供一線圈,該線圈包含一絕緣導線的複數個繞組,其中該絕緣導線包含一金屬導線和包覆該金屬導線的至少一第一絕緣層,其中所述線圈的至少兩個不同的部分形成一第一空間;在步驟402中:形成一覆蓋層,該覆蓋層包含一絕緣材料以覆蓋所述線圈的該至少兩個不同的部分並填充至該第一空間中;在步驟403中:形成一磁性本體,該磁性本體包含至少一磁性粉末,其中該磁性本體封裝該絕緣導線的複數個繞組和該覆蓋層。4 shows a flow chart of a method for forming a magnetic device. The method includes: in step 401: providing a coil including a plurality of windings of an insulated wire, wherein the insulated wire includes a metal wire And at least one first insulating layer covering the metal wire, wherein at least two different parts of the coil form a first space; in step 402: forming a covering layer which includes an insulating material to cover The at least two different parts of the coil are filled into the first space; in step 403: a magnetic body is formed, the magnetic body includes at least one magnetic powder, wherein the magnetic body encapsulates a plurality of the insulated wires The winding and the covering layer.
在一實施例中,絕緣導電的兩個相鄰繞組形成其間的第一空間102,其中覆蓋層103的第一絕緣材料填充至第一空間102中以防止至少一磁性粉末的至少一個顆粒設置在該第一空間中。In an embodiment, two adjacent windings that are insulated and conductive form a
覆蓋絕緣材料於絕緣導線的至少兩個不同的部分的方法有很多種,例如將絕緣導線的至少兩個不同的部分浸漬或浸泡於絕緣材料中,或是噴塗絕緣材料於絕緣導線的至少兩個不同的部分上,或是將絕緣材料滴(dip)到該絕緣導線的該至少兩個不同的部分上。在一實施例中,所述絕緣材料包含一黏膠,其中該覆蓋層是通過將所述黏膠以點膠或灌注的方式覆蓋該絕緣導線的至少兩個不同的部分上而形成,所述黏膠填充至該至少兩個不同的部分所形成的空間中。There are many ways to cover at least two different parts of the insulated wire with insulating material, such as dipping or immersing at least two different parts of the insulated wire in the insulating material, or spraying the insulating material on at least two of the insulated wires. On different parts, or dip insulating material onto the at least two different parts of the insulated wire. In one embodiment, the insulating material includes an adhesive, and the covering layer is formed by covering at least two different parts of the insulated wire with the adhesive by dispensing or pouring, the The glue is filled into the space formed by the at least two different parts.
圖5示出根據本發明一實施例的用於形成一電感的一方法。如圖5所示,該方法包含:在步驟501中:提供一線圈,該線圈包含一絕緣導線的複數個繞組,其中該絕緣導線包含一金屬導線和包覆該金屬導線的至少一第一絕緣層,其中該線圈的兩個端子與一導線架電性連接;在步驟502中:形成一覆蓋層以覆蓋該複數個繞組的至少一部分,其中該覆蓋層包含一第二絕緣材料,該第二絕緣材料填充至由該線圈的不同部分所形成的空間中;在步驟503中:形成一成型本體,封裝該複數個繞組和該覆蓋層,其中該成型本體包含至少一磁性粉末和一黏性材料以混合該至少一磁性粉末中的顆粒;在步驟504中:進行一熱壓以固化該成型本體;在步驟505中:去除該導線架中的不需要的部分;在步驟506中:在該成型本體一下表面上形成兩條引線(lead)以形成該電感。FIG. 5 shows a method for forming an inductor according to an embodiment of the invention. As shown in FIG. 5, the method includes: in step 501: providing a coil, the coil including a plurality of windings of an insulated wire, wherein the insulated wire includes a metal wire and at least one first insulated wire covering the metal wire Layer, wherein the two terminals of the coil are electrically connected to a lead frame; in step 502: forming a covering layer to cover at least a part of the plurality of windings, wherein the covering layer includes a second insulating material, the second The insulating material is filled into the space formed by the different parts of the coil; in step 503: forming a molded body, encapsulating the plurality of windings and the covering layer, wherein the molded body contains at least one magnetic powder and a viscous material To mix the particles in the at least one magnetic powder; in step 504: perform a hot pressing to solidify the molded body; in step 505: remove unnecessary parts in the lead frame; in step 506: in the molding Two leads are formed on the bottom surface of the body to form the inductor.
圖6示出根據本發明的一個實施例的用於形成電感器的方法。如圖6所示,該方法包含:在步驟601中:提供一線圈,該線圈包含一絕緣導線的複數個繞組,其中該絕緣導線包含一金屬導線和包覆該金屬導線的至少一第一絕緣層,其中該線圈的兩個端子與一導線架電性連接;在步驟602中:形成一覆蓋層以覆蓋該複數個繞組的至少一部分,其中該覆蓋層包含一第二絕緣材料,該第二絕緣材料填充至由該線圈的不同部分所形成的空間中;在步驟603中:形成一成型本體,封裝該複數個繞組和該覆蓋層,其中該成型本體包含至少一磁性粉末和一黏性材料以混合該至少一磁性粉末中的顆粒,其中成型本體在不使用熱加工的情況下固化;在步驟604中:去除該導線架中的不需要的部分;在步驟605中:在該成型本體一下表面上形成兩條引線以形成該電感Fig. 6 shows a method for forming an inductor according to an embodiment of the present invention. As shown in FIG. 6, the method includes: in step 601: providing a coil including a plurality of windings of an insulated wire, wherein the insulated wire includes a metal wire and at least one first insulated wire covering the metal wire Layer, wherein the two terminals of the coil are electrically connected to a lead frame; in step 602: forming a covering layer to cover at least a part of the plurality of windings, wherein the covering layer includes a second insulating material, the second The insulating material is filled into the space formed by the different parts of the coil; in step 603: forming a molded body, encapsulating the plurality of windings and the covering layer, wherein the molded body includes at least one magnetic powder and a viscous material In order to mix the particles in the at least one magnetic powder, the molded body is solidified without thermal processing; in step 604: remove unnecessary parts in the lead frame; in step 605: under the molded body Two leads are formed on the surface to form the inductor
本發明具有許多優點:(1)覆蓋層可以使得線圈能夠承受更高的成型壓力,以防止線圈在磁性粉末被壓製成磁性本體時短路;(2)覆蓋層可防止絕緣導線的自粘層在成型過程中流動而溢出;(3)增加線圈與磁性粉末之間的絕緣程度;(4)使線圈能夠承受更高的電壓。The present invention has many advantages: (1) The covering layer can make the coil to withstand higher molding pressure to prevent the coil from short-circuiting when the magnetic powder is pressed into the magnetic body; (2) The covering layer can prevent the self-adhesive layer of insulated wire Flow and overflow during the molding process; (3) Increase the degree of insulation between the coil and the magnetic powder; (4) Enable the coil to withstand higher voltage.
儘管已經參考上述實施例描述本發明,但是對於本領域普通技術人員來說顯而易見的是,在不脫離本發明的精神的情況下,可以對所描述的實施例進行修改。 因此,本發明的範圍將由所附權利要求限定,而不是由上面詳細描述限定。Although the present invention has been described with reference to the above-mentioned embodiments, it is obvious to a person of ordinary skill in the art that the described embodiments can be modified without departing from the spirit of the present invention. Therefore, the scope of the present invention will be defined by the appended claims instead of the above detailed description.
101a:金屬導線
101b:第一絕緣層
101c:第二絕緣層
102:第一空間
103:覆蓋層
104:磁性本體
105:不同部分
106:不同部分
201:線圈
205:絕緣導線
206:終端部分
401:步驟:提供包含複數個繞組的一絕緣導線的一線圈
402:步驟:用一第二絕緣材料封裝該絕緣導線的至少兩個不同的部分
403:步驟:用包含至少一磁性粉末和一黏性材料的一磁性材料封裝該絕緣導線的複數個繞組和該第二絕緣材料
501:步驟:提供包含複數個繞組的一絕緣導線的一線圈
502:步驟:形成一覆蓋層
503:步驟:形成一成型本體
504:步驟:進行一熱壓以固化該成型本體
505:步驟:修整該導線架
506:步驟:在該成型本體一下表面上形成兩條引線以形成該電感
601:步驟:提供包含複數個繞組的一絕緣導線的一線圈
602:步驟:形成一覆蓋層
603:步驟:形成一成型本體
604:步驟:修整該導線架,去除該導線架的不需要部分
605:步驟:在該成型本體一下表面上形成兩條引線以形成該電感101a:
包括附圖以提供對本發明的進一步理解且附圖包含在本說明書中並構成本說明書的一部分。附圖示出本發明的實施例並與說明書一起用於解釋本發明的原理。 圖1示出本發明一實施例的一磁性裝置之一放大剖面圖,該磁性裝置具有一線圈和覆蓋該磁性裝置的該線圈的兩個不同的部分的一覆蓋層。 圖2A-2B示出本發明另一實施例的在添加一覆蓋層以覆蓋該磁性裝置的該線圈的兩個不同的部分之前和之後之一剖面圖。 圖2C示出本發明的另一實施例的用於覆蓋該磁性裝置的該線圈的至少兩個不同的部分的一覆蓋層之一剖面圖。 圖2D示出本發明另一實施例的用於覆蓋該線圈的複數個繞組的整個外表面的覆蓋層之一剖面圖。 圖3示出本發明一實施例的一磁性裝置。 圖4示出本發明一實施例的用於形成一磁性裝置的一方法之一流程圖。 圖5示出本發明一實施例的用於形成一電感的一方法。 圖6示出本發明另一實施例的用於形成一電感的一方法。The accompanying drawings are included to provide a further understanding of the present invention and the accompanying drawings are included in this specification and constitute a part of this specification. The drawings illustrate the embodiments of the present invention and together with the description serve to explain the principle of the present invention. FIG. 1 shows an enlarged cross-sectional view of a magnetic device according to an embodiment of the present invention. The magnetic device has a coil and a covering layer covering two different parts of the coil of the magnetic device. 2A-2B show a cross-sectional view of another embodiment of the present invention before and after adding a covering layer to cover two different parts of the coil of the magnetic device. 2C shows a cross-sectional view of a covering layer for covering at least two different parts of the coil of the magnetic device according to another embodiment of the present invention. Fig. 2D shows a cross-sectional view of a covering layer for covering the entire outer surface of a plurality of windings of the coil according to another embodiment of the present invention. Fig. 3 shows a magnetic device according to an embodiment of the invention. FIG. 4 shows a flowchart of a method for forming a magnetic device according to an embodiment of the present invention. FIG. 5 shows a method for forming an inductor according to an embodiment of the invention. FIG. 6 shows a method for forming an inductor according to another embodiment of the present invention.
101a:金屬導線 101a: Metal wire
101b:第一絕緣層 101b: first insulating layer
101c:第二絕緣層 101c: second insulating layer
102:第一空間 102: First Space
103:覆蓋層 103: Overlay
104:磁性本體 104: Magnetic body
105:不同部分 105: different parts
106:不同部分 106: different parts
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