LTCC (Low-temperature co-fired ceramic) filter manufacturing method and LTCC filter

Abstract

The invention discloses a LTCC (Low-temperature co-fired ceramic) filter manufacturing method and an LTCC filter. The thickness of an exposed terminal of a middle conductor layer is increased to achieve the design standard after sintering, and the conduction rate of the LTCC filter after terminal printing is ensured. The product qualification rate of the LTCC filter after improvement is greatly enhanced to be 97% from the original 50%, and the cost is greatly reduced. Besides, the electrical connection rate of the LTCC filter port is improved, and the microwave performance of the filter and the consistency of each index are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of printing components for providing electrical connection between printed circuits or printed circuits, and in particular relates to a preparation method of an LTCC filter and the LTCC filter. Background technique [0002] Low-temperature co-fired ceramic (Low-temperature co-fired ceramic, LTCC) technology is to make low-temperature sintered ceramic powder into a green ceramic tape with precise thickness and density, which is used as a circuit substrate material, and punch holes on the green tape. Microhole filling, precision conductive paste printing, lamination, lamination and other processes produce the required circuit pattern, and multiple passive components are embedded in it, then laminated together, and sintered at high temperature to form a three-dimensional circuit The passive integrated components of the network can also be made into a three-dimensional circuit substrate with built-in passive com...

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Problems solved by technology

[0003] However, in the actual production process of LTCC filters, the poor electrical connection performance of the side ports is one of the important factors affecting the product qualification rate

The low electrical connection rate leads to a low yield of LTCC microwave filters, and the highest pass rate can only reach 50%, which greatly increases the manufacturing cost and seriously restricts the mass production and large-scale application of LTCC microwave filters.

The low electrical connection rate of the LTCC filter port is caused by the poor connection between the conductors on the side end and the end of the intermediate layer conduction band, and the thin thickness of the intermediate layer conductor port is the root cause of the electrical connection failure of these two parts. reason

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