for five hours then the temperature is increased at a rate of 5 u00b0 c per minute until it reaches 870 u00b0 c and then maintained for fifty minutes to perform a primary firing process after the primary firing process is completed the constraining layers 20 a and 20 b were removed from the ceramic laminate 10 and a conductive paste was formed on the ceramic laminate 10 by screen printing to form external electrodes 30 then temperature was increased at a rate of 5 u00b0 c per minute until it reaches 870 u00b0 c and then maintained for fifty minutes to perform a secondary firing process of the ceramic laminate 10 having the external electrodes 30 formed thereon the size of the multilayer ceramic substrate manufactured according to inventive example and the size of the multilayered ceramic substrate manufactured according to comparative example were measured the measurement data is shown in table 1 below referring to table 1 there is a difference of approximately 0 5 in width between the multilayer ceramic substrate manufactured according to inventive example in which the primary and secondary firing processes are performed at different firing temperatures from each other and the multilayer ceramic substrate manufactured according to comparative example in which the primary and secondary firing processes are performed at the same firing temperature.