JPS5939008A - Thin transformer - Google Patents

Abstract

PURPOSE:To manufacture a thin transformer at compact form and light weight, by a method wherein semi-coil patterns are formed on both surfaces of an insulation substrate. CONSTITUTION:An insulation substrate 1 is made of resin or ceramics, and a plurality of primary semi-coil patterns 2A and a plurality of secondary semi-coil patterns 3A are alternately formed on one surface 1A of the substrate 1 by means of printing or the like. Corresponding to the primary semi-coil patterns 2A and the secondary semi-coil patterns 3A at both ends, primary terminal patterns 5, 6 and secondary terminal patterns 7, 8 are formed on one surface of the insulation substrate 1 by means of printing or the like. A plurarity of primary semi-coil patterns 2B and a plurality of secondary semi-coil patterns 3B are alternately formed also on other surface of the insulative substrate 1 by means of printing or the like. These patterns are connected by conductors 9, 10 within a plurality of through holes as a primary coil 2 and a secondary coil 3. A magnetic core 11 is embedded in the substrate 1.

Description

[Detailed Description of the Invention] Recently, electronic components have become smaller and lighter, and when conventional transformers were added to a board, they were thicker or taller than other components, so they took up a lot of mounting space on the board. .

An object of the present invention is to provide a thin transformer that can be easily made thinner and smaller.The thin transformer according to the present invention has a primary side and a secondary side on one side of an insulating substrate. A plurality of half-coil patterns are provided on each side, a plurality of half-coil patterns on the primary side and a plurality of secondary side half-coil patterns are provided on the other side of the insulating substrate, and the first half-coil pattern on both sides of the insulating substrate is
Each half coil pattern on the next side and the secondary side is connected to the primary coil and the second half coil pattern by each conductor in the plurality of through holes penetrating the insulating substrate.
The coils are characterized by being connected to each other to form a coil.

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 3 show a first embodiment of the present invention. The thin transformer of this embodiment has an insulating substrate l made of resin or ceramic, and one surface IA of the insulating substrate l has a plurality of primary side half coils/'P-turns 2A and a plurality of stripes. The secondary half coils/4' turns 3A of the strips are alternately provided with glint marks I11, etc. A primary terminal pattern 5 is provided on one surface of the insulating substrate 1 corresponding to the two primary side half-coil patterns and the secondary side half-coil pattern 3A at both ends.
．． 6 and secondary terminal patterns 7.8 are provided by printing or the like. Also on the other surface of the insulating substrate 1, a plurality of primary half-coil patterns 2B and a plurality of secondary half-coil patterns 3B are alternately provided by printing or the like.

Primary half coil patterns 2A on both sides of these insulating substrates 1
and 2B and the secondary half coil patterns 3A and 3B are connected to the primary coils 2 and 2 at each conductor 9.10 in a plurality of through holes penetrating the insulating substrate 1 at both ends of each pattern.
The coils 3 are connected to each other to form a secondary coil 3.

A plate-shaped magnetic core 11 is embedded in the insulating substrate 1 so as to penetrate through the primary coil 2 and the secondary coil 3 . As the magnetic core 11, for example, pure iron (Armco iron or Carvinyl iron), silicon steel, permalloy, or the like is used.

FIG. 4 shows a second embodiment of the invention. In the thin transformer of this embodiment, the diameter of the secondary coil 3 is smaller than the diameter of the primary coil 2.

Note that this thin transformer may be an air-core transformer by omitting the magnetic core 11.

As explained above, the thin transformer according to the present invention is formed by providing half-coil patterns on both sides of the insulating substrate, so it can be formed very thin and can be easily made smaller and lighter. This makes it possible to increase the packaging density of electronic devices. Furthermore, according to the present invention, mass production can be easily achieved by using printing technology, etc., and costs can be reduced.

[Brief explanation of the drawing]

1 and 2 are front and rear views of a first embodiment of a thin transformer according to the present invention, FIG. 3 is a sectional view taken along the line X-X of FIG. 1, and FIG. FIG. 7 is a front view of a second embodiment of the thin transformer. ■...Insulating board, 2...Primary coil, 2A, 2B.
...1st '9111 half = + A, no + turn, 3.
...Secondary coil, 3A. 3B...Secondary side half coil pattern, 516...Primary terminal flat turn, 7, 8...Secondary terminal z! turn, 9
, 10... Through-hole inner conductor, 11... Magnetic core.

Claims (1)

[Claims] A plurality of primary and secondary half-coil patterns are provided on one surface of the insulating substrate, and a plurality of primary and secondary half-coil gloss patterns are provided on the other surface of the insulating substrate. and each half coil pattern on the primary side and the secondary side on both sides of the insulating substrate is configured such that each conductor in a plurality of through holes penetrating the insulating substrate forms a primary coil and a secondary coil. A thin transformer characterized by being connected to each other.