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SEMI S8-0705 © SEMI 1995, 2005 41 RELATED INFORMATION 7 SEMI S8 SUPPLIER ERGONOMI C SUCCESS CRITERIA (SESC) CHECKLIST APPLICATIONS GUIDE NOTICE : This rel ated infor mation is n ot an offici al part of SEM I S8 and was d…

SEMI S8-0705 © SEMI 1995, 2005 40

R6-2.4 Areas coded by luminance only should differ in display luminance with respect to each other by ratio of at

least 1.5:1.

R6-2.5 Where blink coding is used solely to attract attention, a single blink frequency of 1Hz to 5Hz with a duty

cycle of 50% is recommended. Where readability is required during blinking, a single blink rate of 1/3Hz to 1Hz

with a duty cycle of 70% is recommended. It should be possible to switch off the blinking of the cursor.

R6-2.6 The number of colors simultaneously presented on a display should be based on the performance

requirements of the task. In general, the number of colors simultaneously presented should be minimized. For

accurate identification, the default color set(s) should consist of no more than eleven colors in each set.

R6-3 Input Devices

NOTE R6-11: Refer to ISO 9241 and EN 894-3 for detailed guidelines.

R6-3.1 Input characteristics should be selected to suit the specific conditions of use. For example, the performed

task, workstation arrangement, ambient levels of illumination in the work area, and related tasks should be

considered.

R6-3.2 Keyboards should permit easy repositioning on the work surface. Other than for special applications with

clearly defined tasks, the keyboard should be detachable. The keyboard should be stable during use (i.e., it should

not slip or rock).

R6-3.3 Keyboard support surfaces should be adjustable to accommodate standing or seated operation where

suitable.

SEMI S8-0705 © SEMI 1995, 2005 41

RELATED INFORMATION 7

SEMI S8 SUPPLIER ERGONOMIC SUCCESS CRITERIA (SESC)

CHECKLIST APPLICATIONS GUIDE

NOTICE: This related information is not an official part of SEMI S8 and was derived by the EHS Ergonomics

Task Force. This related information was approved for publication by full letter ballot on September 3, 2003.

R7-1 Purpose

R7-1.1 This section is provided as a companion to the SEMI S8 Supplier Ergonomic Success Criteria (SESC)

checklist as an aid to help equipment designers and evaluators understand how to apply the checklist when designing

equipment or assessing machine designs or prototypes.

R7-1.2 This applications guide follows the numbering scheme of the SESC checklist. When appropriate, notes,

illustrations and diagrams have been added to clarify each item.

NOTE R7-1: For the purpose of this document, “weight” is defined as the force of gravity and units are specified in Newtons (N),

and pound-force (lbf.). One lbf. is the force of gravity on a one-pound mass (lb.) and 9.81 N is the force of gravity on a one-

kilogram mass (kg.).

Table R7-1 Supplier Ergonomic Success Criteria Checklist Applications Guide

Section 1: Manual Material Handling

Section Indicator

1.1 Potentially hazardous manual material handling tasks performed as part of operations, maintenance, or service are

analyzed utilizing appropriate procedures.

NOTE: Two hand lifting or lowering tasks should be analyzed:

if the object being handled weighs more than 44.5 N (10 lbf);

OR, if the object weighs more than 22.2 N (5 lbf) and the anticipated frequency is greater than 1 lift every 5 minutes.

See Appendix 2 for further information.

Acceptance criterion: Analysis and results documentation. Table A2-2, Appendix 2, or the equivalent, should be used

to document 2-hand lift/lower analysis.

Section 2: Product Loading in a Standing Posture

Section Indicator Figure

2.0 Product Loading in a Standing Posture (Applicable to all media other

than wafer cassettes including JEDEC trays, magazines and reticle

cassettes.

NOTE A: The criteria of this section should be applied only to production

operations where media will be loaded and unloaded by people.

NOTE B: This guideline may also be applied to manually loaded FOUPs.

NOTE C: A load port is the surface upon which the machine operator

places the media or the base of the media when it is placed on a machine

arm or in a receptacle.

NOTE D: Coupling point is the center of a handle or the center of the

large middle knuckle of the hand when it grasps an object.

SEMI S8-0705 © SEMI 1995, 2005 42

Section 2: Product Loading in a Standing Posture

Section Indicator Figure

2.1 Clearance provided for finger thickness.

Acceptance criterion: minimum 38 mm (1.5 in.)

NOTE: Minimum clearance should be provided for the finger

clearance for the hand when it is in the orientation used to

grip the item. If the object is grasped from the sides, there

should be finger clearance on both sides. If the object is

grasped from above and below, such as when inserting or

removing a reticle container, there should be minimum finger

clearance above and below the object.

Finger clearance

Minimum 38 mm

(1.5 in.)

One hand Two hands

2.2 Clearance provided for hand thickness.

Acceptance criterion: minimum 76 mm (3.0 in.)

Hand clearance

Minimum 76 mm

(3.0 in.)

2.3 Reach distance measured from the leading edge of the tool or

obstruction to the hand/product coupling point(s).

Acceptance criterion: maximum 330 mm (13 in.)

NOTE: Reach distances should be measured from the leading edge

of the machine housing or any obstruction between the

machine operator and the load port. Obstructions include

keyboard trays, drip trays, anti-vibration platforms and

machine load-bearing pads.

Reach distance

Maximum 330 mm

(13 in.)

2.4 Vertical coupling point of hand to product in load position.

Acceptance criteria: maximum 1010 mm (40 in.)

minimum 890 mm (35 in.)

NOTE: Machine height variables such as the presence of load-

bearing pads, anti-vibration platforms, casters or the

adjustment of leveling feet should be specified when

measuring the load port height.

Vertical coupling

Maximum 1010 mm

(40 in.)

Minimum 890 mm

(35 in.)