Caring Circuit Tech Limited
Tel. +86 755 2309 0196
Fax. +86 755 2309 0196
An unbelievably simple approach to order from us.
Just two steps from you
Step #1: You- Send Gerbers with quantity, specifications, destination, etc. View details
Step #3: You- Confirm your order and pay. View payment term
All in advance (preferred, it will save bank charges)
30% deposit and balance before delivery against pcb reports and photos of bare pcb, packages and packing list (OK). View reports and photos format
Step #4: We- PCB layout check and fabrication. View engineering query format
Step #5: We- Reports of fabrication status. View fabrication reports format
Step #6: We- Deliver and send you delivery note. View delivery note format
When refers to the base material of the PCB, Tg value is one of the most important factor to consider. The Tg indicates the temperature at which the PCB base material starts yielding. It is important to avoid any yielding of PCB base materials. The Tg value of the base material sets here an upper boundary, at which the resin matrix decomposes and a subsequent delamination occurs. The Tg is thus not the value of the maximum operational temperature, but rather that which the material can endure for only a very short time. A guideline for a continuous thermal load is an operating temperature approximately 25°C below the Tg. A high Tg is very important for the PCBs to guard against barrel cracking and pad fracture during soldering operationPCB base materials with the highest available Tg values allow peak temperatures of up to 260°C (Tg260) at a maximum operating temperature of around 200°C.
Multilayer boards with many layers
High temperature electronics
High Tg is also popular in LED industry, because heat dissipation of LED is higher than normal electronic components, and same structure of FR4 board is much cheaper than that of MCPCB. If working temperature is higher than 170/180C, such as 200C, 280C, or even higher, then you'd better use Ceramic board which can go through -55~880C.
High glass flow temperature value (Tg)
High temperature durability
Long delamination durability
Low Z axis expansion (CTE)
S1170 & S1000-2: Shengyi Brand
KB6167: King board brand
FR406, FR408, IS410 & DS370HR: Isola
Depending on the stock on hand, the materials listed may be replaced by technically equivalent or similar products. For critical tolerances, please discuss your requirements with our sales. We will be right here for you.
The decomposition temperature Td of a resin system depends on the binding energies within the polymers, and not on the glass transition temperature Tg. A good indicator for this characteristic is the T260 or T288 value, which specifies the time until delamination at 260°C or 288°C, respectively.
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