|Conveyor furnace, furnaces for the electronic industry.|
Koyo Thermo Systems Co., Ltd. is represented in Europe by
Industrial Furnaces Steel tempering Ceramic Furnaces Glass Furnaces Sintering Box-Ovens Conveyor Cracker Exo Endo Moldatherm
Koyo Thermo Systems is producing a wide range of conveyor furnaces for many applications like firing of thick films, firing of condenser electrodes, firing of thermal heads, all types of sealing and annealing and drying, soldering, brazing, re-flow, and resin curing. Special clean conveyor furnaces are used in FPD production. On this page we give you an overview over the equipment available for these applications. However this is not a complete list. Please contact us if you need further information.
Here are some applications for firing of special thick film pastes:
Metallisation pastes are fired between 500 and 950°C depending on the system used. Brazing paste of Cu/Ag eutectic type is brazed in wet H2 or cracked ammonia (forming gas) at 800 - 840°C.
Special firing of base-metal pastes (Cu paste)
The firing of copper paste requires special gas control because of the susceptibility to the influence of air. Therefore, a nitrogen atmosphere furnace is needed to keep the inside oxygen concentration less than 5 ppm.
Special firing of overglazes and underglazes
Resistor overglazes are usually fired between 500 and 600°C (typically at 525°C). Thermal print head underglaze is fired in the range of 850 to 930°C and thermal print head overglaze is treated at 850°C. Other special overglaze have to be fired in the same range between 500 and 930°C.
Sealing temperature depends on seal thickness, sealing time, application. The temperature range for firing of sealing glass is between 400 and 675°C.
Polymer conductors, dielectrics and protective coatings.
Polymer conductors are based on silver filled phenolic (cure temperature at 150 - 220°C) or acrylic for lower cure temperatures (at 80 - 120°C). Dielectric and protective coatings are based on silicone or epoxy with a cure range of 125 - 200°C.
| Meshbelt transport is used in this
soldering furnace. Temperature is 260°C. The furnace has
a downstream gas flow and can be run under nitrogen atmosphere or
using a reducing atmosphere (forming gas). Full consideration has been
taken on safety mechanisms and for easy handling of the equipment.
For lead free soldering, Koyo developed recently a conveyor furnace with a walking beam transport system which causes very few vibrations. Details are available on request.
|This is a small conveyor furnace of high performance in heating and cooling at low costs. LGO heater is equipped for simplifying the design and to reduce the weight.The touch panel provides an excellent maneuverability. It can be used in a wide range of applications for not only laboratory and development but also small lot production, high precision treatment and so forth. It can be operated from 350°C - 1000°C. Dimension is 530 x 1355 x 3000 mm3 (W x H x L). Belt width is 100 - 200mm.|
Mainly for drying of thick film pastes, Koyo Thermo Systems developed a conveyor furnace that uses infrared lamp heating. The temperature uniformity at 130°C is ±5°C.
|Two different types of hot plate heating equipment is also available from Koyo Thermo Systems. First version transports the wafer by a teflon belt, second version uses a shuttle transport system. In both cases wafers are processes one by one. Max. temperature is 150°C / 200°C.|
|Roller hearth furnaces have been designed to anneal large and heavy samples. The transport inside this clean, horizontal, continuous furnace is done by stainless steel rods. In order to avoid metallic contamination, ceramic tubes, made of pure alumina can be installed over these steel rods. All roller hearths are driven by a special chain transmission system that avoids slip during the transport of the samples. The furnace itself consists of a special glass muffle and far IR Moldatherm® heaters. An advanced temperature control system ensures a temperature uniformity of less than 1°C. This furnace can be used for annealing of glass plates in plasma display panel production.|
Crystec Technology Trading GmbH, Germany, www.crystec.com, +49 8671 882173, FAX 882177
Conveyor furnaces consists of different types of muffles and in most cases Moldatherm® heating elements. In some cases SiC-heaters, IR lamp heating, convectional heating or hot plate heating is used.
| Moldatherm® heating
elements consist of special heating wire that is vacuum molded into a
ceramic fiber isolation material. Moldatherm® heating
elements have a low heat capacity. They have very similar properties
compared to the LGO heating elements, used
in semiconductor furnaces.
Moldatherm® heating elements assure an easy maintenance of the conveyor furnace. Moldatherm® heaters are compact and light. The furnace is built by blocks of Moldatherm® heaters. The installation can be done easily and quickly. No special tools are required for this work.
Many different transport systems are used in Koyo Thermo Systems conveyor furnaces, e.g.:
Loading can be done manually or automatic. Koyo Thermo Systems can provide different loading and unloading systems. Different process gases can be used in Koyo Thermo Systems furnaces, like inert gases, forming gas or hydrogen. The oxygen content can be measured, using an oxygen analyzer. As an option in many cases a Stange controller can be used. That way it is possible to connect the furnace controller to a PC-network.
Please also visit our special page for conveyor furnaces and ovens for flat panel production (FPD).
Koyo Thermo Systems and Crystec will be pleased to engineer a cost effective system to satisfy your most demanding and exacting requirements.
|Crystec Technology Trading GmbH will be pleased to further discuss details with you.|
| Are you interested in further information?
Please contact us!
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