录像机磁头中白金不良率与MnZn铁氧体单晶中白金点个数的关系  

The Relation Between the NG(no good) Ratio for Platinum at VTR Magnetic Heads and the Numbers of Platinum Point in MnZn Ferrite Monocrystal

作　　者：傅景世 

机构地区：[1]大连华录影音实业有限公司,大连116023

出　　处：《信息记录材料》2001年第3期6-7,17,共3页Information Recording Materials

摘　　要：本文讨论了录像机磁头中的白金不良率 (因一定大小的白金点在磁头的重要区域附近，从而使得这种磁头的特性较低被判定为不良品，这种磁头在整个不良品磁头中所占的比率 )和 MnZn铁氧体单晶中一定大小白金点的个数之间的相互关系。 MnZn铁氧体单晶中一定大小白金点的个数越多，录像机磁头中的白金不良率也越高。为了控制录像机磁头中的白金不良率在 1％以下，必须将 MnZn铁氧体单晶中 25mm× 2.57mm面积内直径大于 0.005mm的白金点的个数控制在 5个以内。The relation,between the no good ratio for platinum at VTR magnetic head(because some size platinum points are near the effective zone of the magnetic head,the specific properties of the magnetic head become low so it is thought of no good as a part,its ratio to total magnetic heads is said to be the no good ratio for platinum)and the numbers of some size platinum points in MnZn ferrite monocrystal, had been discussed.The result is, the more the numbers of some size platinum points in MnZn ferrite monocrystal, the higher the no good ratio for platinum at VTR magnetic head,To control the no good ratio for platinum is not beyond 1％ at VTR magnetic head,it is necessary to control the numbers of platinum point(its diameter is greater than 0.005 mm) is not beyond 5(within the area of 25 mm× 2.57 mm)in MnZn ferrite monocrystal.

关 键 词：录像机 磁头 MnZn铁氧体单晶 白金点 不良率 

分 类 号：TN946.21[电子电信—信号与信息处理]