Magnetic disk drive and flexible printed board used in such drive

A magnetic disk drive comprising:

• one or more magnetic disks;
• one or more read/write heads each recording or reproducing information for a corresponding one of said magnetic disks;
• a servo head reading control information from a predetermined one of said magnetic disks in order to control positioning of said one or more read/write heads;
• an actuator supporting said one or more read/write heads and said servo head;
• and
• a flexible printed board having a first layer and a second layer generally defining flat surfaces that face each other, said second layer being positioned under said first layer, wherein first circuit components for said one or more read/write heads, second circuit components for said servo head, a first printed pattern connected to said first circuit components, and a first part of a second printed pattern connected to said second circuit components are formed in and supported by said first layer, while a second part of said second printed pattern is formed in and supported by said second layer so that said first circuit components are bypassed by said second part of said second printed pattern, said second part of said second printed pattern extending underneath said first circuit components in said second layer, said second part of said second printed pattern bypassing said first components in a separate plane from a plane generally defined by said first components, wherein horizontal space required for said second printed pattern on said first layer is reduced;
• first leads extending from said one or more read/write heads along one side of said actuator;
• and
• second leads extending from said servo head along another side of said actuator so that at least a portion of said second leads are positioned a selected distance in space from said first leads.