A7 4 3 68 2 2 五、發明說明(/ 本發明係關於一種平面電路板式電感、變壓器及其製 造方法’,尤指一種可在不提高線圈匝數及印刷電路板面積 的前提下、,而增加電感量之平面電路板式電感、變壓器。 按’,尚速與微型化係電子元件恆久不變之追求目標, 由於該等趨勢與實際需求,·電路板上有越來越多内層連線 的尺寸大小與電氣特性被提出檢討,再者如依然採用外建 的被動元件,.即意謂將無法達成系統產品微型化的目標; 此外件)無可避氤的龙备铽中 產立額二卜的電里應匕更不利的异,福 if員狀您、下感效應將成為電磁輻射另 迪_關阻抗變身,如熟習此項技藝者所能理 解,前述狀況將嚴重影響電路工作的正確性。 基於微型化與改善電氣特性等因素,將被動元件内建 於印刷甩路板中的想法即應運而生'而常用的被動元件包 括電阻、.電谷及電感等三種,其中電阻·、電容引起了較多 注意,·如利用高介電係數材料製作高電容密度的元件,一 種將鎳金屬溥膜失在鋼箔和絕緣層間的構造用來製作電阻 。然而’電感及其他相關元件(如變壓器),一直到最近 幾年才受到重視,而第一個被提出來的實際電感產品是呈 平面狀 '主要係在印刷電路板中内建金屬線圈,如欲構成 一變壓器’則需要兩组同心的金屬線圈,其中一組為輸入 端’.係供與電源或信號源連接,另外一組用作為輸出線叫 〇 然而,’内建平面式變壓器有一重大缺點在於其相對容 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公愛Γ (請先閱讀背面之注意事項再填寫本頁) --------訂----1-----線· 經濟部智慧財產局員工消費合作社印製 -ί ·1 n I ϋ - 436822 A7 B7 五、發明說明(二) 許的電抓崔度過小。根據過去的經驗,最大容許電流密度 可以藉由改變金屬線圈的線寬以獲得改善。但在高頻要求 下’·伴隨著任何迴路而來的复l^Cskin efiect).,即 使透過線圈線宽的改變·,並不會產生顯著的改善效果。主 要原因在於:導線通過電流時將產生磁場,該磁場將令帶 電粒子向導線表面推擠·,因此在一條長直導線中,電流只 會在表面至表面以下一定深度間的區域傳導,同時傳導的 區域將隨著電流頻率的升高而減少”故在呈螺旋狀的線圈 結構中,,電流將由中心處被推擠到最外層表面,而對於平 =狀的電感而言金屬導線的厚度與集膚效應在某頻率下 木度的乘積方為電流能夠通過的有效區域丨故而,不論如 訂 何增加線寬,’在電流流經區域相同的限制下,對於提升電 流密度將不會有多大的幫助2 又由於電感量的大小與線圈的匝數(n )、線圈所圍 繞的面積(A)及線圈内材料的磁導率(/〇呈正比,意 即如要增加電感量則須提高線圈阻數或線圈面積、線圈材 料之導磁率,,但提高匝數或線圈面積均將導致電路板面積 或厚度增加,‘在輕薄短小的要求下,前述方案將受限制, 因此!選擇高導磁率的材料成為較佳的選擇。 如第十一圖所示,.揭露有一種平面電路板式的變壓器 ,其主要係由多層印刷電路板(8 〇)壓合構成,每一層 印刷電路板(8 〇 )表面均透過光製版術轉移形成有銅線 路(8 1 ):各層印刷電路板(8 〇)經壓合後’,並使其 上的銅線路(8 1 )對應連接而分別構成一次繞組及二次 本紙張尺度適用令國國家標準(CNS)A4規格(210 χ 297公釐) A7 經濟部智慧財產局員工消費合作社印製 43 68 2 2 五、發明說明(j 繞組又為提高其電感量,該平面電路板式變壓器透過加 入鐵心(8 2 )的方式提高變壓器之電磁感量,而該鐵 心(8 2)儀與-般傳統變壓器採用_的山型鐵心,該 鐵心(8 2 )的加入雖有助於提高電磁感量,但相對擴大 了變壓器的體積與厚度.,與平面雷故 …、子厌兴十®冤路板式變壓器原用以縮 本身與產《α體積之研發動機不符,故以該等平面電路板 式變壓器.,仍未盡實用完善,有待進—步檢討及謀求解決 之道。. 因此,.本發明主要目的即在提供一.種不虞放大體積亦 無須透過改變線圈線寬即可改善電流密度之平面電路板式 電感、·變壓器_。 為達成前述目的採取的主要技術手段係於兩層以上的 印刷電路板表面分別形成銅線路,經壓合後使各層銅線峰 作電性連接而構成線圈繞組,再於線圈繞組之軸心處鑽孔 ,並充填以鬲導磁率之鐵磁材料作為鐵心,隨即構成一平 面電路板式之電感或變壓器; 由於線圈繞組係環繞高導磁率的鐵心構成,可在不增 加線圈匝數及印刷線路板厚度的前提下,提高線圈繞組的 電感量;·另由於鐵心係以鑽孔充填方式構成.,故不影響電 感或變壓器之體積。 削述的高導磁率鐵磁材料係由鐵、鎳、鈷)短等或其 合金構成。 為使貴審查委員進一步瞭解前述目的及本發明之技 術特徵茲附以圖式詳細說明如后: f紙張尺度適用中國國家標準(CNS)A4規格(21〇 χ 297公釐 (請先閱讀背面之注意事項再填寫本頁)A7 4 3 68 2 2 V. Description of the invention (/ The present invention relates to a planar circuit board type inductor, a transformer and a method for manufacturing the same, particularly a method that can be used without increasing the number of coil turns and the area of the printed circuit board. Increase the inductance of planar circuit board inductors and transformers. According to ', Sangsu and miniaturization are the constant pursuit of electronic components. Due to these trends and actual needs, there are more and more internal wiring on circuit boards. Dimensions and electrical characteristics have been proposed for review. If passive components are still used, it means that the miniaturization of system products will not be achieved; additional parts) Longbei ’s inevitable middle-class production quota The electric power should be more unfavorable. Fortunately, if you are a person, the effect of the sense of underpass will become another aspect of electromagnetic radiation. As those skilled in the art can understand, the foregoing conditions will seriously affect the correct operation of the circuit. Sex. Based on factors such as miniaturization and improvement of electrical characteristics, the idea of building passive components in printed circuit boards came into being. The commonly used passive components include three types: resistance, valley, and inductance. Among them, resistance and capacitance cause More attention has been paid. For example, if a high-capacitance element is made of a high-dielectric-constant material, a structure in which a nickel metal hafnium film is lost between a steel foil and an insulating layer is used to make a resistor. However, 'inductors and other related components (such as transformers) have not been valued until recent years, and the first practical inductor products that have been proposed to be flat are mainly built with metal coils in printed circuit boards, such as To form a transformer, you need two sets of concentric metal coils, one of which is an input terminal. It is used to connect to a power source or signal source, and the other is used as an output line. However, the built-in planar transformer has a significant The disadvantage is that its relative paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public love Γ (Please read the precautions on the back before filling this page) -------- Order ---- 1 ----- Line · Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs-ί · 1 n I ϋ-436822 A7 B7 V. Description of the Invention (II) Xu Dian Cui spent too little. According to past experience, the largest The allowable current density can be improved by changing the line width of the metal coil. However, under high-frequency requirements, "· complex efiect accompanied by any circuit". Even if the line width of the transmission coil is changed, it does not Will produce significant improvements . The main reason is that a magnetic field is generated when a wire passes through a current. This magnetic field will push the charged particles toward the surface of the wire. Therefore, in a long straight wire, the current will only be conducted in the area between the surface and a certain depth below the surface. The area will decrease with the increase of the current frequency. "Therefore, in a spiral coil structure, the current will be pushed from the center to the outermost surface. For a flat inductor, the thickness and concentration of the metal wire The product of the skin effect at a certain frequency is the effective area through which the current can pass. Therefore, no matter how you increase the line width, 'under the same restrictions of the current flow area, there will not be much increase in current density. Help 2 Because the amount of inductance is proportional to the number of turns of the coil (n), the area surrounded by the coil (A), and the permeability of the material in the coil (/ 〇 is proportional, meaning that if you want to increase the inductance, you must increase the coil Resistance or coil area, and the magnetic permeability of the coil material, but increasing the number of turns or the coil area will result in an increase in the area or thickness of the circuit board. The aforementioned solution will be limited, so choose a material with high magnetic permeability to become a better choice. As shown in Figure 11, a flat circuit board transformer is disclosed, which is mainly composed of a multilayer printed circuit board (80). Laminated structure, the surface of each layer of the printed circuit board (80) is transferred through photolithography to form a copper circuit (81): after the layers of the printed circuit board (80) are laminated, the copper circuits are formed thereon (8 1) Corresponding to the connection to form the primary winding and the secondary paper size Applicable to the national standard (CNS) A4 specification (210 χ 297 mm) A7 Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs Consumer Cooperatives 43 68 2 2 5 、 Explanation of the invention (J winding is also used to increase its inductance. The planar circuit board transformer increases the electromagnetic induction of the transformer by adding an iron core (8 2). The iron core (8 2) meter and the traditional transformer use _ Mountain-type iron core. Although the addition of the iron core (8 2) helps to increase the amount of electromagnetic inductance, it relatively expands the volume and thickness of the transformer. It is related to the flat surface lightning ..., Zixin Xingshi® road transformer Shrink It is inconsistent with the production engine of α volume, so these planar circuit board transformers have not yet been practically perfected, and need to be further reviewed and sought for solutions. Therefore, the main purpose of the present invention is to provide one. This kind of planar circuit board inductor and transformer that can increase current density without changing the coil line width can improve the current density. The main technical means adopted to achieve the above purpose is to form copper lines on the surface of two or more layers of printed circuit boards. After the compression, the layers of copper wire peaks are electrically connected to form a coil winding, and then a hole is drilled at the axis of the coil winding, and the ferromagnetic material of the magnetic permeability is filled as the core, and then a flat circuit board type inductor is formed Or the transformer; Because the coil winding is composed of a high-permeability iron core, the inductance of the coil winding can be increased without increasing the number of coil turns and the thickness of the printed circuit board; and because the iron core is formed by drilling and filling. , So it does not affect the volume of the inductor or transformer. The high-permeability ferromagnetic material described here is made of iron, nickel, cobalt, or the like, or an alloy thereof. In order to make your reviewers better understand the foregoing purpose and the technical features of the present invention, detailed drawings are attached as follows: f The paper size applies the Chinese National Standard (CNS) A4 specification (21〇χ 297 mm (please read the back (Please fill in this page again)
436822 A7 B7 五、發明說明(产) C 一)圖式部分:Γ二係本發明一較佳實施例之外觀示意圖 第-圖A、B ·’係本發明—較佳實施例中之 線路製裎示意圖f 第三圖:係本發明—齡社 孝乜實施例之印刷電路板平面示意圖 印刷電路板銅 經濟部智慧財產局員工消費合作社印製 第四圖A〜C ··係本發明—較佳實施例之 孔電鍍」步驟示意圖。 係本發明一較佳實施例之電感平面圖。 係本發明一較佳實施例之電感外觀圖。 係本發明又一較佳實施例之變壓器外觀圖。 係本發明又一較佳實施例之印刷電路板平面示意 圖。 係本發明又一較佳實施例之變壓器平面示意圖。 係本發明又一較佳實施例之變壓器外觀圖。 第十一圖:係習用平面電路板式變壓器之外觀示意圖。 (二)圖號部分: ‘(10)電感 (13)(14)電鍍銅 (1 1 ) ( 1 2 )印刷電路板(1 5 ) ( 2 9 )穿孔 ( 1 6 ) ( 2 9 0 )填充材 (20)變壓器 (1 10) (120)鋼線路(25)〜(28)電艘銅 (1 1 0 A ) (110B)端部 (1 2 0 A ) (120B)端部 (2 1 )〜(2 4)印刷電路板 壓合」及「鑽 第五圖 第六圖 第七圖 第八圖 第九圖 第十圖 本紙張尺度適用中國國家標準(CNS>A4規格(210 X 297公釐) 訂 線 A7 綏濟部智慧財產局員工消費合作社印製 )(1 2 〇 A)將構成電性連接,故使其位於相對位置上 、又銅線路(11〇) (12〇)的相對另端436822 A7 B7 V. Description of the invention (production) C a) Schematic part: Γ Second is a schematic diagram of the appearance of a preferred embodiment of the present invention-Figures A and B · 'is the invention-the circuit system in the preferred embodiment裎 Schematic diagram f Third diagram: This is a schematic diagram of the printed circuit board of the present embodiment of the filial piety of the present invention. Printed circuit board printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The schematic diagram of the step of "hole plating of the preferred embodiment". This is a plan view of an inductor according to a preferred embodiment of the present invention. It is an appearance diagram of an inductor according to a preferred embodiment of the present invention. It is an external view of a transformer according to another preferred embodiment of the present invention. It is a schematic plan view of a printed circuit board according to another preferred embodiment of the present invention. It is a schematic plan view of a transformer according to another preferred embodiment of the present invention. It is an external view of a transformer according to another preferred embodiment of the present invention. Figure 11: This is a schematic diagram of the appearance of a conventional planar circuit board transformer. (2) Part of drawing number: '(10) inductor (13) (14) electroplated copper (1 1) (1 2) printed circuit board (1 5) (2 9) perforation (1 6) (2 9 0) filled Material (20) transformer (1 10) (120) steel line (25) to (28) electric ship copper (1 1 0 A) (110B) end (1 2 0 A) (120B) end (2 1) ~ (2 4) Printed Circuit Board Lamination "and" Drilling Fifth Figure Sixth Figure Seventh Figure Eighth Figure Ninth Figure Tenth Figure This paper size applies to Chinese national standards (CNS > A4 specifications (210 X 297 mm) ) Booking line A7 (printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Suiji) (1 2 0A) will constitute an electrical connection, so it is located in a relative position, and the copper line (11〇) (12〇) is relatively different end
43 68 2 2 五、發明說明(了) (210)〜(240)銅線路 (21()A)〜(U〇A)端部 (210B)〜(240B)端部 首先士丨圖所不,,係本發明之一較佳實施例,其揭 示有一未完成的平面電路板式電感(1 0).,其本體係由 兩層以上的印刷電路板(11) (12)壓合構成,主要 係先分別於印刷電路板(11) 面或兩面上 分別設以環狀的銅線路(110)(圖中僅見上層印刷電 路板(1 1 )之銅線路(1 1 〇 )).,經壓合印刷電路板 (1 1 ) ( 1 2 )後,,再使銅線路(丄丄〇 )構成電性連 接,即構成一完整的線圈繞組;有關在印刷電路板(工丄 )(12 )上形成銅線路(1 1 0 )之方法.,以下謹以單 印刷電路板(1 1 )之製程步驟為例說明,其包括有一 「壓合」步驟及一「鋼線路形成」步驟;其中: 「壓合」步驟’係於-印刷電路板(1 1 )表面設以 銅4 ( 1 1 1 )並予壓合(如第二圖A所示); 「鋼線路形成」步驟,係、以製版術去除多餘鋼羯,而 於印刷電路板(11)上形成鋼線路(11〇)(如第二 圖B所示),。 利用前述方法分別於印刷電路板(丄丄)(丄2 )表 面形成鋼線路(1 10) (12〇)(如第三圖所示), 該銅線路(1 10) (12〇)之其中—端部(ι ΜΑ (請先閱讀背面之注意事項再填寫本頁)43 68 2 2 V. Description of the invention (210) ~ (240) Copper line (21 () A) ~ (U〇A) end (210B) ~ (240B) end This is a preferred embodiment of the present invention, which reveals an unfinished planar circuit board inductor (1 0). The system consists of two or more layers of printed circuit boards (11) (12), which are mainly laminated. Firstly, a ring-shaped copper circuit (110) is respectively arranged on the printed circuit board (11) or both sides (only the copper circuit (1 1 〇) of the upper printed circuit board (1 1) is shown in the figure). After the printed circuit board (1 1) (1 2), the copper circuit (丄 丄 〇) is electrically connected to form a complete coil winding; the formation on the printed circuit board (work) (12) The method of copper circuit (1 1 0). The following is an example of the process steps of a single printed circuit board (1 1), which includes a "pressing" step and a "steel circuit forming" step; of which: "pressing The step of "closing" is based on-the surface of the printed circuit board (1 1) is provided with copper 4 (1 1 1) and pressed (as shown in the second figure A); The excess steel grate is removed by plate-making, and a steel circuit (11) is formed on the printed circuit board (11) (as shown in the second figure B). Use the aforementioned method to form a steel circuit (1 10) (12) (as shown in the third figure) on the surface of the printed circuit board (丄) (2), and one of the copper circuits (1 10) (12). —End (ι ΜΑ (Please read the notes on the back before filling this page)
A7 436822 五、發明說明(厶) B ) ( 1 2_ 〇 B )係作為外部連接之用,,故分別位於錯開 立置上經完成前述銅線路形成步驟後·,即對兩印刷電路 (1 1 ) ( l· 2 )進行壓合,於本實施例中.,係令 刷電路板(1 1 ) ( 1 2 )表面的銅線路(i ! 〇 )(丄 2 0 )朝往同—方向以相互重疊(如第四圖A所示)、,並 於其間設以樹脂(c )再予以壓合,隨後進行—「鎖 鍍j步驟* 电 該「鑽孔電鍍」步驟:請參閱第四圖B所示,為連接 兩印刷電路板(! i )(丄2 )外表面上的銅線路(丄丄 〇) (12〇) 於前述完成壓合的構造上進行鑽孔.,其 鑽孔位置係分別位於銅線路(丄丄〇 )(丄2 〇 )的兩端 部(1l〇A) (ii〇B) (12〇A) (12〇b) ,.由於鋼線路(110) (12〇)其中—端部(11〇 )(1 2 〇 A )係相對應,故其中一.組鑽.孔(a )將通 過前述的對應端部(11〇Α) (12〇Α).,而銅線路 (11〇) (120)另端部(110B) ( 1 2 〇 B ) 則分別為獨立的鑽孔(B )所通過;經完成鑽孔後,即於 鑽孔(A ) ( B )中進行穿孔電鍍而形成電鍍銅(1 3 ) (14)(如第四圖c所示)·’藉此除可使兩組銅線路( 1 1〇) c12 〇)構成電性連接而組成一線圈繞組外, 亦在印刷電路板(1 1 )( 1 2)形成供外部連接之焊塾 C電鍍銅(13) (14)處)_。 經完成前述步驟後再印刷電路板(1 1 1 2 ) 上所構成線圈繞組的中央位置鑽孔,,以形成若干穿孔(1 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) (請先閱讀背面之注意事項再填寫本頁) 訂---------線丨、 經濟部智慧財產局員工消費合作社印製 A7 436822 _______ B7 五、發明說明(7) 5)(如第五圖所示)’.而於各穿孔(15)内分別充填 以混合鐵磁性材料之填充材(丄6 ),以構成鐵心(如第 ’、圖所示)’,由於填充材(工6 )係由聚合體混合高導磁 率的鐵磁性#料構成,、因此,.可藉以提升前述線圈繞組之 電磁感量且因鐵心係以鑽孔充填方式構成’故不致因鐵 心設置而造成體積擴大,。至於前述鐵磁性_可由鐵、錄 、銘、猛等金屬或其合金構成? 又如第七圖所示,係本發明又一較佳實施例,,主要係 用以製造平面電路板式變壓器、其基本製程 '構造愈前一 實㈣大致相…如圖所示係—未完成的平面電路板式變 壓器(2 0 ) ’_其本體係由多層印刷電路板(2工)〜( 2 4 )壓合構成,,每一印刷線路板(2 })〜(2 4 )之 至少一面上分別形成有銅線路(2丄〇)〜(24〇) 請參閲第人圖所示),,其中’印刷電路板(2i) (U )上之銅線路ί 2 1 G ) ( 2 2 ◦)—端部(2 1 〇A) (2 2 0A)係構成電性連接,·另端部(2ι〇) (22 〇)則形成電鍍銅(2 5 ) (2 6)輯成焊塾,供外部 連接:用、,遂前述兩鋼線路(2丄〇 ) ( 2 2 〇 )將構成 〇 ^l J Jc 2 4 )上之銅線路(2 3 0) ( 2 4 0 ) -端部(23〇A) (24〇a)係構 成電性連接’,另端部(230) (pan、st ' r 9 7 w… 〇 )則形成電鍍銅 ( 2 7 ) ( 2 8 )以構成焊塾.,供外部連接之用,而前述 兩銅線路(2 3 Q) ( 2 4 G )則可構成二次繞植。 本紙張尺度適用中國國家標準(CNS)A4規格C 297公釐- --------訂---------線- <請先閱讀背面之注意事項再填寫本頁) ;# 部 智 慧 財 產 局 員 工 消 費 合 作 社 印 製 A7 436822 五、發明說明(β 經完成前述步驟後,,即於多層印刷電路板(2丄)〜 (2 4 )上所構成線圈繞組的中央位置鑽孔,以形成若干 穿孔(2 9 )(如第九圖所示)' 而於各穿孔(2 g )内 分別充填以混合鐵磁性材料之填充材(2 g 〇 ),以構成 鐵心(如第十圖所示).。 經上述說明可看出”本發明分別用以製作平面式電感 及平面式Μ ϋ料細步驟.,主要係於分別於多層印刷電 路板上分別形成銅線路,經壓合後令鋼線路構成電性連接 以形成線圈繞組’_爾後再以鑽孔充填方式,將高導磁率材 料設於線圈繞組的軸心處以構成鐵心·,藉此不僅可改善電 流密度、提高電磁感量.,且不致造成電感或變壓器體積的 擴大;,再者,’利用本發明之方法無須加寬線圈的線寬,即 可達成提高電流密度之目的.,同時亦不受集膚效應所影響 ,故可提供一高效率、.低成本之内建式電感與變壓器,由 此可見’本發明相較於既有的内建式電感及變壓器已具備 顯著功效增進,故已兼具產業上可利用性與進步性”並符 合發明專利要件’.爰依法提起申請,。 閱 讀 背 φ 之 注 I 項 再 填 寫 本 頁 訂 經 濟 部 智 慧 財 產 局 員 工 消 費 合 作 社 印 製 本紙張尺度適用中國國家標準(CNS)A4 (210 X 297 ^f") —A7 436822 V. Description of the invention (厶) B) (1 2_ 〇B) are used for external connection, so they are located in staggered positions respectively. After completing the aforementioned copper circuit forming steps, the two printed circuits (1 1) (l · 2) is pressed, in this embodiment, the copper lines (i! 〇) (丄 2 0) on the surface of the circuit board (1 1) (1 2) are brushed in the same direction Overlap each other (as shown in Figure A in the fourth figure), with resin (c) in between, and then press-fit it, and then proceed— "lock plating step j" * the "drill plating" step: please refer to the fourth As shown in Figure B, a copper circuit (丄 丄 〇) (12〇) connecting the outer surfaces of two printed circuit boards (! I) (丄 2) is drilled on the previously completed structure. The positions are located at both ends (110A) (ii〇B) (12〇A) (12〇b) of the copper line (丄 丄 〇) (丄 2 〇), because the steel line (110) (12 〇) Among them-the end portion (11〇) (12 〇A) is corresponding, so one of the group of drills. The hole (a) will pass through the aforementioned corresponding end portion (11〇A) (12〇A)., The other end of the copper circuit (110) (120) (110B) (1 2 〇B) are respectively passed by independent drilling (B); after drilling is completed, perforation plating is performed in drilling (A) (B) to form electroplated copper (1 3) (14) (as described in (Shown in Figure 4c) · 'This way, in addition to making two sets of copper lines (1 10) c12 〇) form an electrical connection to form a coil winding, it is also formed on the printed circuit board (1 1) (1 2) (C) Electroplated copper (13) (14) for external connection). After completing the foregoing steps, drill the center of the coil winding on the printed circuit board (1 1 1 2) to drill holes to form a number of perforations (1 paper size applies to China National Standard (CNS) A4 (210 X 297) Li) (Please read the precautions on the back before filling out this page) Order --------- line 丨, printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 436822 _______ B7 V. Description of Invention (7) 5 ) (As shown in the fifth picture) '. And each hole (15) is filled with a filler material (丄 6) of mixed ferromagnetic material to form an iron core (as shown in the' picture, '). Material (work 6) is composed of polymer mixed with high permeability ferromagnetic material. Therefore, the electromagnetic inductance of the coil winding can be increased and the core is formed by drilling and filling, so it is not caused by the core setting. And cause the volume to expand. As for the aforementioned ferromagnetism, can it be composed of metals such as iron, iron, inscription, and fierce, or alloys thereof? As shown in the seventh figure, it is another preferred embodiment of the present invention, which is mainly used to manufacture planar circuit board transformers, and the basic process of the structure is similar to the previous one ... as shown in the figure—unfinished Planar circuit board transformer (2 0) '_ This system is composed of a multilayer printed circuit board (2 workers) ~ (2 4) laminated, and at least one side of each printed circuit board (2)) ((2 4)) Copper lines (2 丄 〇) ~ (24〇) are formed on the top, respectively, and the copper lines on the printed circuit board (2i) (U) are 2 1 G) (2 2 ◦) —The end (2 1 〇A) (2 2 0A) constitutes an electrical connection, and the other end (2 〇) (22 〇) forms electroplated copper (2 5) (2 6) to form a solder joint. For external connection: Use the above two steel lines (2 丄 〇) (22) to form copper wires (2 3 0) (2 4 0) on the J ^ c J 4 (4)-end (23〇A) (24〇a) constitutes an electrical connection ', and the other end portion (230) (pan, st' r 9 7 w ...) forms electroplated copper (2 7) (2 8) to constitute a solder塾., For external connection, and the two copper lines (2 3 Q) (2 4 G) can form a secondary winding. This paper size is applicable to China National Standard (CNS) A4 specification C 297 mm--------- Order --------- Line- < Please read the notes on the back before filling this page ); # Department of Intellectual Property Bureau, printed by A7, Consumer Cooperative, A7 436822 V. Description of the invention (β After completing the above steps, the central position of the coil winding formed on the multilayer printed circuit board (2 丄) ~ (2 4) Drill holes to form a number of perforations (2 9) (as shown in the ninth figure) ', and fill each of the perforations (2 g) with a filler material (2 g 0) mixed with a ferromagnetic material to form an iron core (such as (Shown in the tenth figure).... According to the above description, "the present invention is used to make a planar inductor and a planar M material, respectively. It is mainly based on the formation of copper lines on a multilayer printed circuit board. After the pressing, the steel lines are electrically connected to form the coil windings. Then, by drilling and filling, a high permeability material is placed on the axis of the coil windings to form the iron core. This not only improves the current density, The amount of electromagnetic induction. Without causing inductance or transformer body The expansion of the product; further, 'the method of the present invention can achieve the purpose of increasing the current density without widening the line width of the coil. At the same time, it is not affected by the skin effect, so it can provide a high efficiency. Low-cost built-in inductors and transformers, it can be seen that 'the present invention has a significant improvement in efficiency compared to the existing built-in inductors and transformers, so it has both industrial availability and progress "and accords with the invention The patent requirements'. The application was filed according to the law. Read the note I of φ and fill in this page again to print the paper printed by the Ministry of Economic Affairs Intellectual Property Bureau employee consumer cooperatives. The paper size is applicable to China National Standard (CNS) A4 (210 X 297 ^ f " ) —
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